久久久久国产精品aⅴ天堂,成人性生交A片免费直播APP ,男女扒开双腿猛进入爽爽免费,日本JAPANESE少妇高清

Shaanxi Antong Biotechnology Co., Ltd. A professional Manufacturer of  API&Pharmaceutical intermediates  in China. has a registered capital of 1 million yuan and is one of dynamic foreign trade companies in the Chinese market. 

We have a pharmaceutical raw material production plant and a reagent R&D center. We now have complete product line. In addition, we have developed and produced tens of thousands of reagents. We also have the business of custom synthesis of various organic compounds as a supplement. We can synthesize almost all chemicals. Our goal is to survive by quality and develop by credit.