Liu Jiyu, master of preventive veterinary medicine, national licensed veterinarian; currently serves as deputy general manager of Huanshan Group's pig breeding department, in charge of production technology; head of Weihai Comprehensive Experimental Station of Shandong Pig Industry Innovation Team, responsible for related production and health Training and promotion of management and other technical solutions. After graduation, he has been engaged in pig production and pig health management related work. He has been responsible for the production and management of modern pig farms of different scales including 2,400, 6,200, and 9,800 sows, as well as other scale pig farms. The United States participates in on-site production and health management training on pig farms. Actively sum up the pig herd production management experience in the work, at present 16 articles have been published, 2 English articles, 2 books have been edited, and 5 national, provincial and municipal projects have been participated in.