Chang Zhigang, senior veterinary, president of Animal Health Service and Welfare Branch of CVMA. In July, 1991, he graduated from the major of animal nutrition, China Agricultural University. He is the pioneer of China animal diseases traceability system, and has long-time research experience in livestock and animal diseases traceability system, as well as rich experience in animal husbandry informatization management research. He had been in charge of the formulation and amendment of Animal RFID Application Technology Standard, Livestock and Poultry Animal Welfare Evaluation Requirement, Laboratory Animal Welfare Requirement, and Animal Welfare Evaluation Rule. His main inventions and works include National Livestock and Poultry Decision-making System for Emergency Control of the State Council, Cattle Intelligent Farm Management System, Pig Farming Management System, and Animal Identification and Disease Traceability System.