Biocytogen Pharmaceuticals (Beijing) Co., Ltd., a biotechnology company, engages in the research and development of antibody-based drugs in the People's Republic of China, the United States, and internationally. Its core products are YH001, a recombinant humanized anti-cytotoxic t-lymphocyte associated protein 4 immunoglobulin G1 (IgG1) monoclonal antibody, which has completed Phase I clinical trial for the treatment of patients with advanced solid tumors; and YH003, a humanized IgG2 agonistic monoclonal antibody that is in Phase II clinical trial for the treatment of unresectable/metastatic mucosal melanoma and pancreatic duct adenocarcinoma, and Phase I clinical trial for the treatment of solid tumors. The company also develops YH002, a recombinant humanized IgG1 antibody that targets the human tumor necrosis factor receptor superfamily, member 4 receptor, which is Phase I clinical trial; YH004, a humanized anti-4- tumor necrosis factor receptor superfamily, member 9 IgG1 antibody that is in Phase I clinical trial for the treatment of advanced solid tumors and relapsed/refractory non-Hodgkin's lymphoma; and YH008, an anti-PD-1 x cluster of differentiation 40 (CD40) bispecific antibody that is in Phase I clinical trial for the treatment of solid tumors. In addition, its preclinical candidates include YH012 and YH013, fully human anti-HER2/TROP2 bispecific antibody drugs conjugate for therapeutic product development, manufacturing, and commercialization for all human indications; YH015, a fully human IgG1 antagonistic monoclonal antibody targeting CD40; and YH016 and YH017, two novel molecules. The company has collaboration with Syncromune, Inc.; out license agreement with RemeGen Co., Ltd.; license agreement with Chipscreen NewWay Biosciences; and collaboration with Acepodia Inc. for development of dual-payload bispecific antibody-drug conjugates. Biocytogen Pharmaceuticals (Beijing) Co., Ltd. was incorporated in 2009 and is headquartered in Beijing, China.