Zhichun Yan, manager of Beijing Zhengzhun Agricultural Technology Co., Ltd, majoring in Animal Epidemiology and Agribusiness Management. He has long been engaged in the research and management of modern pig farming application technology, involving many professional fields such as efficiency management of pig farms, differential diagnosis of diseases under production conditions, on-farm selective breeding management and precision nutrition. In recent years, his main research directions have been pig health management and improvement of operating efficiency under actual production conditions.