According to the eye of the sky check information search learned that the four suppliers are the Beijing Municipal Center for Physical and Chemical Analysis and Testing, affiliated with the Beijing Municipal Academy of Science and Technology, Qingdao Sangong Biotechnology Company Limited, is an enterprise engaged in the research and experimental development of the main enterprises, Jinwei Zhi GENEWIZ, is focused on genome research and gene technology application of the bio-technology company, Ltd., an enterprise mainly engaged in professional and technical services.