Changzhou Longterm Biotechnology Co., Ltd. is a research-driven and customer-focused company with head office located in Changzhou, Jiangsu, China, and sales office located in Xi'an, Shaanxi, China. As a professional manufacturing company, we discover, develop and commercialize innovative active pharmaceutical ingredients (APIs), cosmetic ingredients and dietary supplements, both synthetical and natural, which enable people to live to the greatest potential, to see more clearly, move more ...