Acknowledgments
We sincerely thank Ms. Wen-Qin Yuan, Ms. Ying Cao, Mr. Xin Pang, and others for their hard cooperation in field investigation for many years. They are all from the Chengdu University of Technology. We gratefully recognize the persons from the wildlife protection division of Sichuan Forestry and Grassland Administration, the various levels of locality protection and management department, and local guides, for providing convenience for our field investigation. This project was supported by the Special Project of Orchid Survey of National Forestry and Grassland Administration (contract no. 2019073015 and no. 2019073016)