1. Research Institute of Forestry Policy and Information, Chinese Academy of Forestry, Beijing 100091, China
2. College of Economics and Management, China Agricultural University, Beijing 100083, China
3. Faculty of Forestry, The University of British Columbia, Vancouver, BC V6T 1Z4, Canada
4. Research Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, Beijing 100091, China
5. Institute of Forestry, Tribhuvan University, Kathmandu 44600, Nepal
6. School of Ecology and Environment Science, Yunnan University, Kunming 650031, China