According to Tian Yan's inquiry, I know the technical development, technical consultation, technical promotion and technical service of stem cells and biological products of Beijing Hengfeng Mingcheng Biotechnology Co., Ltd.; Class I medical device production; Acting as an agent for import and export, technology import and export, and goods import and export; Sales of instruments and meters, chemical reagents, chemical products (excluding dangerous chemicals), cosmetics, medical devices, sanitary products and daily necessities; Conference services; Undertaking exhibitions; Health consultation and health management (except for diagnosis and treatment activities subject to approval); Designing, producing, displaying and publishing advertisements; Retail drugs. (Market entities independently choose business projects and carry out business activities according to law; Retail drugs and items subject to approval according to law shall be subject to business activities in accordance with the approved contents after being approved by relevant departments; Shall not engage in business activities of projects prohibited or restricted by the industrial policies of the state and this Municipality. )