1, Rongchang Bio: According to the company's information in official website, Rongchang Bio is headquartered in Yantai, Shandong Province, China, with experimental research institutions and offices in China and the United States. The company's shares were listed on the Science and Technology Innovation Board on March 3, 20221. The stock is called Rongchang Bio for short. The stock code is 68833 1. Rongchang Bio is committed to the discovery, development, production and commercialization of the first and best biopharmaceuticals of its kind, and has created a number of new biopharmaceuticals with great clinical value in the fields of autoimmune, tumor, ophthalmology and other major diseases.

2. According to the company's information in official website, East China Pharmaceutical Co., Ltd. (stock code: 000963) was established in 1993, with its headquarters in Hangzhou, Zhejiang Province, and was listed on the Shenzhen Stock Exchange in February 1999. After more than 20 years of development, the company's business covers the whole pharmaceutical industry chain, with the pharmaceutical industry as the leading factor, and at the same time, it has expanded the business of pharmaceutical commerce, medical beauty industry and industrial microbiology, and has developed into a large-scale comprehensive pharmaceutical listed company integrating pharmaceutical R&D, production and circulation.