Zhejiang Cheng Yi Pharmaceutical Co., Ltd. researches, develops, produces, and sells formulations and active pharmaceutical ingredients in China and internationally. Its products include glucosamine hydrochloride raw materials and preparations, gastrodin raw materials, ribavirin preparations raw materials, and sulfur dioxide raw materials, as well as injections, capsules, tablets, traditional Chinese medicines, and intermediates. The company also offers joint-related drugs, diuretics and antihypertensive drugs, antiviral drugs, antitumor drugs, vitamins, and sedative and brain-boosting drugs, along with other health products and medical instruments. Formerly known as Wenzhou No. 3 Pharmaceutical Factory, it changed its name to Zhejiang Cheng Yi Pharmaceutical Co., Ltd. in April 2001. Founded in 1966, the company is based in Shanghai, China.