HEJIANG JIASHAN CHENGDA PHARM&CHEM CO., LTD as the largest manufacturer of L-carnitine series in China, the factory is ISO9001 certified, and all of our carnitine derivatives are Halal certificated, meanwhile our drying packing and crystalizing room are met with GMP requirements(100000grade).For the other products, we are also the leading manufacturer in China. Our factory is located in Jianshan County Zhejiang Province, the traffic is very convenient, it needs 1.5 hour to get Shanghai and Hangzhou. Rely on our excellent quality, dedicated customer services, competitive prices & friendly atmosphere, we want to extend our product in your market, and build a long term business relationship with your esteem company, welcome you to send inquiry