Beijing VDJBio Co., LTD.(referred to as Weidejie Biotechnology) is a national high-tech enterprise and a specialized and innovative small and medium-sized enterprise in Beijing. Focusing on the development of innovative antibody drugs in the field of autoimmune diseases, we have developed a series of antibody/fusion protein drugs for the treatment of autoimmune diseases through our own antibody affinity enhancement and optimization platform that simulates the maturation mechanism of human antibodies, as well as large-scale drug trial, pilot, and industrial production platforms.