Liaoning Chengda Biotechnology Co., Ltd. is a China-based biopharmaceutical enterprise primarily engaged in the research, development, manufacturing, and commercialization of human vaccines and immunobiological products. Founded in 2002 and headquartered in Shenyang, Liaoning Province, the company operates as a subsidiary of Liaoning Cheng Da Co., Ltd. and trades on the Shanghai Stock Exchange Science and Technology Innovation Board. The company focuses on prophylactic biopharmaceuticals, leveraging proprietary high-density microcarrier Vero cell culture platforms and modern purification technologies to produce high-purity inactivated viral vaccines. Its core commercial product portfolio comprises freeze-dried human rabies vaccines (Vero cell) marketed under the Speeda brand for pre-exposure and post-exposure prophylaxis; inactivated Japanese encephalitis vaccines (Vero cell) sold under the Meiweijia brand for pediatric and adult immunization against the Japanese encephalitis virus; live attenuated varicella vaccines for chickenpox prevention; and quadrivalent split-virion influenza vaccines for seasonal protection against influenza A and B viruses. In addition, the company actively develops a pipeline of next-generation biologics, including 13-valent pneumococcal conjugate vaccines (PCV13), bivalent and nonavalent human papillomavirus (HPV) vaccines, recombinant shingles vaccines, and combination pediatric vaccines. The company supplies public health authorities across all provincial-level administrative regions in mainland China through municipal and county-level Centers for Disease Control and Prevention (CDCs), while exporting products to more than thirty countries and regions across Asia, Africa, and Latin America. In recent developments, the company has expanded its manufacturing and quality control capabilities with automated production lines and cold-chain logistics facilities at its Shenyang and Benxi industrial bases; formed strategic collaborative research agreements with domestic and international biomedical research institutions to advance mRNA and recombinant protein vaccine technologies; and pursued World Health Organization (WHO) prequalification alongside overseas regulatory registrations to accelerate expansion into global emerging markets.