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

  Jinan Chenghui-Shuangda Chemical Co., Ltd is established in March, 2002. It is a high-tech enterprise professionally producing pharmaceutical intermediates and fine chemical products . The company is located in  Jinan, the capital city of Shandong Province.

  We have engaged in research, development and production of pharmaceutical intermediates for more than 20 years. It combines research, development, production, import and export trade as a whole, and it has great technical power, advanced detection means, strong research and development ability and superb synthetic technique.