BIN Van-fang, DAG; researcla field: regulation of animal food intake. E-mail: seminars@126.com. SHU Gang, lecturer; research field: animal nutrition physiology. E-mail: shugang@scau.edu.cn. ZHOU-Li-hua, research-associate; research field: animal nutrition physiology. E-mail: michel.ch@ 163.com Corresponding author: JIANG Qing-yan, professor; research field: animal nutrition physiology. E-mail: qyjiang@scau.edu.cn