2019 Vol. 34, No. 6
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2019, 34(6)
:1-8.
doi: 10.3969/j.issn.2096-1553.2019.06.001
Abstract:
To explore the changes of intestinal microbiota in healthy human by oral HZB-1synbiotic, the intestinal flora belong intervention was amplified by high-throughput sequencing,ensuring the effect of synbiotic preparation. The experiment showed that the abundance and diversity of the intestinal microbiota of the subjects were significantly improved. At the "gate" level, the abundance of intestinal microbiota increased significantly and the proportion of Firmicutes increased. There was a certain dynamic balance between Actinobacteria and Proteobacteria. At the "genus" level, the abundance of beneficial bacteria such as Blautia, Faecalibacterium and Gemmiger increased significantly, while the abundance of harmful bacteria such as Haemophilus and Parasutterella reduced significantly.This indicated that the intake of synbiotic preparation played a beneficial role in regulating the structure of gut microbiota.
To explore the changes of intestinal microbiota in healthy human by oral HZB-1synbiotic, the intestinal flora belong intervention was amplified by high-throughput sequencing,ensuring the effect of synbiotic preparation. The experiment showed that the abundance and diversity of the intestinal microbiota of the subjects were significantly improved. At the "gate" level, the abundance of intestinal microbiota increased significantly and the proportion of Firmicutes increased. There was a certain dynamic balance between Actinobacteria and Proteobacteria. At the "genus" level, the abundance of beneficial bacteria such as Blautia, Faecalibacterium and Gemmiger increased significantly, while the abundance of harmful bacteria such as Haemophilus and Parasutterella reduced significantly.This indicated that the intake of synbiotic preparation played a beneficial role in regulating the structure of gut microbiota.
2019, 34(6)
:9-14.
doi: 10.3969/j.issn.2096-1553.2019.06.002
Abstract:
The jujube flesh and the jujube core of Xinjiang Hetian jujube,Xinjiang Ruoqiang grey jujube, Shaanxi Qingjian Goutou jujube and Shanxi Yellow River beach jujube were treated by acid digestion.The absorption of jujube flesh and jujube core was measured, and the iron content of jujube flesh and jujube core was calculated.The results showed that the iron content in jujube flesh was from high to low for Shanxi Yellow river beach jujube > Shaanxi Qingjian dogtou jujube > Xinjiang Ruoqiang grey jujube > Xinjiang Hetian jujube; the iron content in jujube cores was from high to low for Shanxi Yellow river beach jujube > Shaanxi Qingjian dogtou jujube > Xinjiang Hetian jujube > Xinjiang Ruoqiang grey jujube, which determined that the jujube cores contained a small amount of iron.
The jujube flesh and the jujube core of Xinjiang Hetian jujube,Xinjiang Ruoqiang grey jujube, Shaanxi Qingjian Goutou jujube and Shanxi Yellow River beach jujube were treated by acid digestion.The absorption of jujube flesh and jujube core was measured, and the iron content of jujube flesh and jujube core was calculated.The results showed that the iron content in jujube flesh was from high to low for Shanxi Yellow river beach jujube > Shaanxi Qingjian dogtou jujube > Xinjiang Ruoqiang grey jujube > Xinjiang Hetian jujube; the iron content in jujube cores was from high to low for Shanxi Yellow river beach jujube > Shaanxi Qingjian dogtou jujube > Xinjiang Hetian jujube > Xinjiang Ruoqiang grey jujube, which determined that the jujube cores contained a small amount of iron.
2019, 34(6)
:15-23.
doi: 10.3969/j.issn.2096-1553.2019.06.003
Abstract:
Based on the analysis of the mechanism of freezing and dehydration of aquatic products, the relevant literatures on the development and application of salt water-retaining agents, sugar water-retaining agents, and protein gel water-retaining agents were combed. It was pointed out that excessive addition would worsen the flavor of aquatic products, although salt water-retaining agents had better performance. Sugar-based water-retaining agents and protein gel-based water-retaining agents were natural, green and safe, but the water-retaining properties alone were weak and costly. In view of this, through the use of natural ingredients such as polysaccharides and oligosaccharides, the production cost of sugar water-retaining agents was reduced, or sugar water-retaining agents and protein gel water-retaining agents were used as the main raw materials to mix with phosphorus-free salts. The synergistic effect of the composite water-retaining agent to enhance the water-retaining will effect and reduce the application cost can become future research directions.
Based on the analysis of the mechanism of freezing and dehydration of aquatic products, the relevant literatures on the development and application of salt water-retaining agents, sugar water-retaining agents, and protein gel water-retaining agents were combed. It was pointed out that excessive addition would worsen the flavor of aquatic products, although salt water-retaining agents had better performance. Sugar-based water-retaining agents and protein gel-based water-retaining agents were natural, green and safe, but the water-retaining properties alone were weak and costly. In view of this, through the use of natural ingredients such as polysaccharides and oligosaccharides, the production cost of sugar water-retaining agents was reduced, or sugar water-retaining agents and protein gel water-retaining agents were used as the main raw materials to mix with phosphorus-free salts. The synergistic effect of the composite water-retaining agent to enhance the water-retaining will effect and reduce the application cost can become future research directions.
2019, 34(6)
:24-32.
doi: 10.3969/j.issn.2096-1553.2019.06.004
Abstract:
The coating liquid of reconstituted tobacco were irradiated for different period by ultraviolet (UV), and the volatile aroma components of the coating liquid of reconstituted tobacco after irradiation were extracted using simultaneous distillation and solvent extraction method, then identified by GC-MS, and then analyzed by principal component analysis and sensory evaluation. The results showed that the optimal UV treatment time was 15 min. At this time, there were 55 kinds of aroma components, and the newly generated aroma components mainly included alcohols, ketones and aldehydes, such as solavetivone, linalool, and benzaldehyd, etc;the aroma amount of cigarettes was increased slightly, the smoke mildness was slightly increased, and the sensory effect was the best.
The coating liquid of reconstituted tobacco were irradiated for different period by ultraviolet (UV), and the volatile aroma components of the coating liquid of reconstituted tobacco after irradiation were extracted using simultaneous distillation and solvent extraction method, then identified by GC-MS, and then analyzed by principal component analysis and sensory evaluation. The results showed that the optimal UV treatment time was 15 min. At this time, there were 55 kinds of aroma components, and the newly generated aroma components mainly included alcohols, ketones and aldehydes, such as solavetivone, linalool, and benzaldehyd, etc;the aroma amount of cigarettes was increased slightly, the smoke mildness was slightly increased, and the sensory effect was the best.
2019, 34(6)
:33-39.
doi: 10.3969/j.issn.2096-1553.2019.06.005
Abstract:
In order to realize the determination of the sizing amount of tipping glue to the finished cigarette,the factors affecting the sizing amount of tipping glue and the relationship with the ventilation rate of the filter were studied in depth,and the glue based on the cementing content in the cigarette was established. The determination factors were optimized,and the sizing amount measurement method was determined based on the solid content of glue.The results showed that this method had high precision and good repeatability, and could effectively distinguish the difference in the sizing amount with different production conditions under the number of cigarette 20,drying temperature 100℃ and drying time 2 h,which could be applied to the detection and evaluation of the sizing amount of finished cigarettes.The sizing amount of tipping glue increased with the pressure of the glue,and decreased with the increase of the speed.There was a significant negative correlation between the sizing amount of tipping glue and the ventilation rate of the filter. Therefore,the formulation of the sizing amount control standard is conducive to improving the stability of the filter ventilation rate and further improve the homogenization level in cigarette prduction.
In order to realize the determination of the sizing amount of tipping glue to the finished cigarette,the factors affecting the sizing amount of tipping glue and the relationship with the ventilation rate of the filter were studied in depth,and the glue based on the cementing content in the cigarette was established. The determination factors were optimized,and the sizing amount measurement method was determined based on the solid content of glue.The results showed that this method had high precision and good repeatability, and could effectively distinguish the difference in the sizing amount with different production conditions under the number of cigarette 20,drying temperature 100℃ and drying time 2 h,which could be applied to the detection and evaluation of the sizing amount of finished cigarettes.The sizing amount of tipping glue increased with the pressure of the glue,and decreased with the increase of the speed.There was a significant negative correlation between the sizing amount of tipping glue and the ventilation rate of the filter. Therefore,the formulation of the sizing amount control standard is conducive to improving the stability of the filter ventilation rate and further improve the homogenization level in cigarette prduction.
2019, 34(6)
:40-47,95.
doi: 10.3969/j.issn.2096-1553.2019.06.006
Abstract:
Study the effects of different packing methods,including divided into four blocks horizontally and four blocks vertically inside the box,on natural alcoholization of Yuxi K326 CO3S flue-cured tobacco lamina.The results showed that:compared with the control sample,the color of those turned faster,the oiliness of those was better,the aroma appeared earlier,with a small amount of gas; the alcoholization process had stronger chemical reaction; the peak of sensory quality was 4 months in advance. In summary,the packing method in the box could accelerate the alcoholization reaction of the tobacco leaves and greatly shorten the alcoholization cycle of the tobacco leaves.
Study the effects of different packing methods,including divided into four blocks horizontally and four blocks vertically inside the box,on natural alcoholization of Yuxi K326 CO3S flue-cured tobacco lamina.The results showed that:compared with the control sample,the color of those turned faster,the oiliness of those was better,the aroma appeared earlier,with a small amount of gas; the alcoholization process had stronger chemical reaction; the peak of sensory quality was 4 months in advance. In summary,the packing method in the box could accelerate the alcoholization reaction of the tobacco leaves and greatly shorten the alcoholization cycle of the tobacco leaves.
Research on the fragrance uniformity and its influencing factors of cigarette silk flavoring process
2019, 34(6)
:48-55.
doi: 10.3969/j.issn.2096-1553.2019.06.007
Abstract:
Essence flow,material flow,nozzle group and atomizing pressure were adjusted in production-experiments. Ultrasonication-extraction-gas-chromatography-mass-selective method (UE-GC/MS) were used for qualitative and quantitative tests of the samples:at determinate flavoring rate,the absolute quantity of essence in tobacco grows with essence flow rate decreasing; at determinate essence flow rate,the absolute quantity of essence in tobacco decreases with fogging degree increasing. The total uniformity coefficient calculating by principal component analysis (PCA) was used to evaluate the flavoring uniformity in tobacco primary processing. Experimental results shows that the flavoring uniformity decreased when the fogging degree increasing at low essence flow (30 kg/h); and increased with fogging degree increasing at high essence flow (≥ 50 kg/h). The flavoring uniformity calculation result increase with standing time and fogging degree increasing,when using single nozzle. The maximum flavoring uniformity calculation result turns up at essence flow rate of 50 kg/h and material flow rate of 4500 kg/h.
Essence flow,material flow,nozzle group and atomizing pressure were adjusted in production-experiments. Ultrasonication-extraction-gas-chromatography-mass-selective method (UE-GC/MS) were used for qualitative and quantitative tests of the samples:at determinate flavoring rate,the absolute quantity of essence in tobacco grows with essence flow rate decreasing; at determinate essence flow rate,the absolute quantity of essence in tobacco decreases with fogging degree increasing. The total uniformity coefficient calculating by principal component analysis (PCA) was used to evaluate the flavoring uniformity in tobacco primary processing. Experimental results shows that the flavoring uniformity decreased when the fogging degree increasing at low essence flow (30 kg/h); and increased with fogging degree increasing at high essence flow (≥ 50 kg/h). The flavoring uniformity calculation result increase with standing time and fogging degree increasing,when using single nozzle. The maximum flavoring uniformity calculation result turns up at essence flow rate of 50 kg/h and material flow rate of 4500 kg/h.
2019, 34(6)
:56-63.
doi: 10.3969/j.issn.2096-1553.2019.06.008
Abstract:
The ordinary activated sludge was inoculated in the SBR reactor, and the temperature was 22~26℃, the pH was 7.8 to 8.0, the DO value was less than 0.1 mg/L, and the ammonia nitrogen concentration in the feed water was 400 mg/L.After 21 d,the nitrogen accumulation rate was stable above 95% and the partial nitrosation was started successfully; then the conditions of ammonia nitrogen concentration, reaction time, water exchange ratio and other conditions were changed to stabilize the operation to 75 d; during the anaerobic ammonia oxidation start-up phase, the reaction time was adjusted to 7 hours of aeration and 16 hours of anaerobic, the total nitrogen removal rate reached more than 70% after 35 days,and the partial nitrosation-anaerobic ammonia oxidation process started successfully. In different stages of the reactor, the relative abundance of proteobacteria was reduced from 83.64% to 10.09%; the relative abundance of floccus was increased from 1.63% to 8.1%.
The ordinary activated sludge was inoculated in the SBR reactor, and the temperature was 22~26℃, the pH was 7.8 to 8.0, the DO value was less than 0.1 mg/L, and the ammonia nitrogen concentration in the feed water was 400 mg/L.After 21 d,the nitrogen accumulation rate was stable above 95% and the partial nitrosation was started successfully; then the conditions of ammonia nitrogen concentration, reaction time, water exchange ratio and other conditions were changed to stabilize the operation to 75 d; during the anaerobic ammonia oxidation start-up phase, the reaction time was adjusted to 7 hours of aeration and 16 hours of anaerobic, the total nitrogen removal rate reached more than 70% after 35 days,and the partial nitrosation-anaerobic ammonia oxidation process started successfully. In different stages of the reactor, the relative abundance of proteobacteria was reduced from 83.64% to 10.09%; the relative abundance of floccus was increased from 1.63% to 8.1%.
2019, 34(6)
:64-71.
doi: 10.3969/j.issn.2096-1553.2019.06.009
Abstract:
The fermentation method of milk residue cooperating with sludge was used to inspect the hydrolytic acidizing performance of sludge fermentation system under the different ratio of milk residue as well as the microbial recycle of fermentation liquor as carbon source. The results showed that with the increase of the milk residue ratio,the protein and polysaccharides production increased,the production of NH4+-N increased, while the production of PO43--P increased first and then decreased. In the early fermentation,short chain fatty acid (SCFAs) of high milk residue ratio fermentation system was lower than other fermentation systems. However,the SCFAs increased rapidly with the value being 4 289.15 mgCOD/L(the unit refered to the chemical oxygen demand COD,the mass concentration of the substance,the same below). At the same time,the removal rate of COD,NH4+-N and PO43--P was 84.50%,97.94% and 76.46%respectively under m(fermentation liquor):m(sodium acetate)=3:1 condition. Although the removal rate of pollutant declined with fermentation liquor ratio,but the treated volume of pollutant increased. Therefore,microorganism could use the fermentation liquor as carbon source effectively.
The fermentation method of milk residue cooperating with sludge was used to inspect the hydrolytic acidizing performance of sludge fermentation system under the different ratio of milk residue as well as the microbial recycle of fermentation liquor as carbon source. The results showed that with the increase of the milk residue ratio,the protein and polysaccharides production increased,the production of NH4+-N increased, while the production of PO43--P increased first and then decreased. In the early fermentation,short chain fatty acid (SCFAs) of high milk residue ratio fermentation system was lower than other fermentation systems. However,the SCFAs increased rapidly with the value being 4 289.15 mgCOD/L(the unit refered to the chemical oxygen demand COD,the mass concentration of the substance,the same below). At the same time,the removal rate of COD,NH4+-N and PO43--P was 84.50%,97.94% and 76.46%respectively under m(fermentation liquor):m(sodium acetate)=3:1 condition. Although the removal rate of pollutant declined with fermentation liquor ratio,but the treated volume of pollutant increased. Therefore,microorganism could use the fermentation liquor as carbon source effectively.
2019, 34(6)
:72-79.
doi: 10.3969/j.issn.2096-1553.2019.06.010
Abstract:
Visible-light catalysis technology of Ag/g-C3N4 (silver/graphite carbon nitride) was applied to the removal of sulfadiazine in wastewater. The degradation effect of Ag/g-C3N4 on sulfadiazine and water quality factors,degradation mechanism,intermediate products and its degradation effect on sulfadiazine in actual water were investigated. The results showed that Ag/g-C3N4 with a mass fraction of 5% could effectively degrade sulfadiazine under visible-light irradiation,with a removal rate of up to 98.3%,and the degradation process conformed to the pseudo-first-order kinetic model; the pH and alkalinity of the solution Ag/g-C3N4 had little effect on the degradation of sulfadiazine,but the presence of humic acid in the solution inhibited the degradation of sulfadiazine; during the degradation of sulfadiazine,·O2- and photogenerated holes were the main activities species; the degradation process mainly produced 4 kinds of intermediate products,which were 2-aminopyrimidine,p-aminobenzenesulfonic acid,hydroxylated sulfadiazine,and nitrated sulfadiazine. When the Songhua River water and the secondary effluent of domestic sewage were used as the water quality background,the removal rates of Ag/g-C3N4 for sulfadiazine were 95.4% and 77.5%,respectively.
Visible-light catalysis technology of Ag/g-C3N4 (silver/graphite carbon nitride) was applied to the removal of sulfadiazine in wastewater. The degradation effect of Ag/g-C3N4 on sulfadiazine and water quality factors,degradation mechanism,intermediate products and its degradation effect on sulfadiazine in actual water were investigated. The results showed that Ag/g-C3N4 with a mass fraction of 5% could effectively degrade sulfadiazine under visible-light irradiation,with a removal rate of up to 98.3%,and the degradation process conformed to the pseudo-first-order kinetic model; the pH and alkalinity of the solution Ag/g-C3N4 had little effect on the degradation of sulfadiazine,but the presence of humic acid in the solution inhibited the degradation of sulfadiazine; during the degradation of sulfadiazine,·O2- and photogenerated holes were the main activities species; the degradation process mainly produced 4 kinds of intermediate products,which were 2-aminopyrimidine,p-aminobenzenesulfonic acid,hydroxylated sulfadiazine,and nitrated sulfadiazine. When the Songhua River water and the secondary effluent of domestic sewage were used as the water quality background,the removal rates of Ag/g-C3N4 for sulfadiazine were 95.4% and 77.5%,respectively.
2019, 34(6)
:80-88.
doi: 10.3969/j.issn.2096-1553.2019.06.011
Abstract:
The disadvantages of the conventional predictive torque control method for permanent magnet synchronous motor are large calculation amount and the requirement of designing weighting factor, an improved predictive torque control method for permanent magnet synchronous motor without weighting factor was proposed.The method performed predictive control on a stationary coordinate system, avoiding a large number of coordinate transformation operations,thereby simplifying the prediction process.The torque control error and the flux control error were converted into a standard value, and a new objective function was proposed based on the standard value to eliminate the influence of the weighting factor. The simulation results showed that the control effect of the method was better than that of the conventional predictive torque control method,and the system design process was simplified without the coordinate transformation operation and weighting factor design.
The disadvantages of the conventional predictive torque control method for permanent magnet synchronous motor are large calculation amount and the requirement of designing weighting factor, an improved predictive torque control method for permanent magnet synchronous motor without weighting factor was proposed.The method performed predictive control on a stationary coordinate system, avoiding a large number of coordinate transformation operations,thereby simplifying the prediction process.The torque control error and the flux control error were converted into a standard value, and a new objective function was proposed based on the standard value to eliminate the influence of the weighting factor. The simulation results showed that the control effect of the method was better than that of the conventional predictive torque control method,and the system design process was simplified without the coordinate transformation operation and weighting factor design.
2019, 34(6)
:89-95.
doi: 10.3969/j.issn.2096-1553.2019.06.012
Abstract:
Aiming at the shortcomings of higher system cost and complexity when using high-power laser light sources or external power amplification equipment to improve the sensitivity of photoacoustic spectrum detection,based on the ordinary first-order resonant photoacoustic cell and the introduction of Herriott multiple reflection cell technology, a trace gas detection system based on long optical path near infrared photoacoustic spectrum was designed.The system increased the optical path of the beam through the photoacoustic cell through the Herriott structure, and improved the absorption light intensity of the gas to be measured. The resonance of the photoacoustic signal was enhanced in the photoacoustic cell, which effectively increased the conversion power of photoacoustic without increasing the power of the light source, and improved the detection sensitivity of the system. The results of verification experiments using NH3 as an example showed that when the average time was 100 s, the minimum detection limit of NH3 was 2.69×10-7, and the normalized equivalent noise absorption coefficient of 1σ was 9.87×10-11 W·cm-1·Hz-1/2. It showed that the system had simple structure and low cost,and could be widely used in the field of trace gas detection.
Aiming at the shortcomings of higher system cost and complexity when using high-power laser light sources or external power amplification equipment to improve the sensitivity of photoacoustic spectrum detection,based on the ordinary first-order resonant photoacoustic cell and the introduction of Herriott multiple reflection cell technology, a trace gas detection system based on long optical path near infrared photoacoustic spectrum was designed.The system increased the optical path of the beam through the photoacoustic cell through the Herriott structure, and improved the absorption light intensity of the gas to be measured. The resonance of the photoacoustic signal was enhanced in the photoacoustic cell, which effectively increased the conversion power of photoacoustic without increasing the power of the light source, and improved the detection sensitivity of the system. The results of verification experiments using NH3 as an example showed that when the average time was 100 s, the minimum detection limit of NH3 was 2.69×10-7, and the normalized equivalent noise absorption coefficient of 1σ was 9.87×10-11 W·cm-1·Hz-1/2. It showed that the system had simple structure and low cost,and could be widely used in the field of trace gas detection.
2019, 34(6)
:96-102.
doi: 10.3969/j.issn.2096-1553.2019.06.013
Abstract:
In order to solve the problem of large vibration and noise caused by the unsteady gear transmission of the traveling reducer under actual working conditions, the two-stage planetary reducer was taken as the object. A three-dimensional model was established through Pro/E software and a dynamic model was established based on the multi-body dynamics simulation software ADAMS to study the dynamics of the reducer transmission system.The results showed that according to the formula of transmission ratio, the theoretical speed of each component was compared with the simulation speed, and the correctness of the model was verified.The simulation analysis of multi-group damping coefficients showed that appropriate damping coefficients could improve the stability of the system, and the optimal damping coefficient was 0.1%K.According to the dynamic simulation analysis based on the optimal damping coefficient, the meshing impact of the secondary planetary wheel and gear ring were the main source of vibration. In actual production, different lubrication methods could be selected to reduce the meshing impact of the gear.
In order to solve the problem of large vibration and noise caused by the unsteady gear transmission of the traveling reducer under actual working conditions, the two-stage planetary reducer was taken as the object. A three-dimensional model was established through Pro/E software and a dynamic model was established based on the multi-body dynamics simulation software ADAMS to study the dynamics of the reducer transmission system.The results showed that according to the formula of transmission ratio, the theoretical speed of each component was compared with the simulation speed, and the correctness of the model was verified.The simulation analysis of multi-group damping coefficients showed that appropriate damping coefficients could improve the stability of the system, and the optimal damping coefficient was 0.1%K.According to the dynamic simulation analysis based on the optimal damping coefficient, the meshing impact of the secondary planetary wheel and gear ring were the main source of vibration. In actual production, different lubrication methods could be selected to reduce the meshing impact of the gear.
2019, 34(6)
:103-108.
doi: 10.3969/j.issn.2096-1553.2019.06.014
Abstract:
The maximum stress of the blade occurs in the 1/3 region of the blade, which may cause the fatigue failure of the blade. The particle swarm optimization (PSO) algorithm combined with the finite element method was used to optimize the layer thickness of a 1.5 MW wind turbine blade root dangerous area. The maximum stress mathematical model was established and the layer thickness was used as variable. The optimal solution was obtained through iterative search. The results showed that the maximum stress in the dangerous area of the blade was reduced by 5.25 MPa, the maximum deformation of the blade was decreased by 78 mm, the optimized first-order natural frequency of the blade was 0.73 Hz and the first-order buckling factor was 2.79, which satisfied the requirements of vibration and stability and improved the blade's fatigue life.
The maximum stress of the blade occurs in the 1/3 region of the blade, which may cause the fatigue failure of the blade. The particle swarm optimization (PSO) algorithm combined with the finite element method was used to optimize the layer thickness of a 1.5 MW wind turbine blade root dangerous area. The maximum stress mathematical model was established and the layer thickness was used as variable. The optimal solution was obtained through iterative search. The results showed that the maximum stress in the dangerous area of the blade was reduced by 5.25 MPa, the maximum deformation of the blade was decreased by 78 mm, the optimized first-order natural frequency of the blade was 0.73 Hz and the first-order buckling factor was 2.79, which satisfied the requirements of vibration and stability and improved the blade's fatigue life.
Journal Information
Founded in 1986， bimonthly
Administered by：The Education Department Henan Province
Sponsored by：Zhengzhou University of Light Industry
Editor-in-chief：Wei Shizhong
Executive Editor-in-Chief：Zou Lin
Deputy Editor-in-Chief：Qu Shuanghong
Edited & published by：Editorial Department of Journal of Light Industry
CN 41-1437/TS
ISSN 2096-1553
Address：136 Science Avenue, Zhengzhou City, Henan Province, China
Postal Code：450001
Tel：(086)0371-86608635
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