1. College of Resources, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
2. Key Laboratory of SFGA on Conservation Biology of Rare Animals in The Giant Panda National Park (CCRCGP), Dujiangyan, Sichuan 611830, China
3. Dujiangyan Campus, Sichuan Agricultural University, Dujiangyan, Sichuan 611830, China
4. College of Tourism and Town and Country Planning, Chengdu University of Technology, Chengdu, Sichuan 610059, China