This book systematically describes the achievements and current situation of in vitro diagnostic (IVD) industry in China. It consists of twelve parts, including the overview on the IVD industry in China in 2021, hot technologies and products of IVD industry, academic, technological and product development in the field of IVD, such as biochemical diagnosis, immune-diagnosis, point-of-care testing, molecular diagnosis, blood and body fluid diagnosis, microbial detection, laboratory assembly line, etc. In this second edition, the new contents added include the development of new coronavirus molecular diagnostic products, flight mass spectrometry, tandem mass spectrometry, tumor markers, ELISA immune reagents, autoimmune diagnostics, concomitant diagnosis, fecal and intestinal microecology detection, pathological diagnosis, raw materials for in vitro diagnostic reagents, standard substances and quality controls for in vitro diagnostic reagents, etc., making the content of the whole book more novel and rich. This book is compiled by an editorial committee composed of well-known entrepreneurs, experts and professors in IVD industry in China. It is a reference book for practitioners of IVD industry, medical laboratory and medical staffs all over the world.