1. Faculty of Life Science and Technology, Central South University of Forestry and Technology, Changsha 410004, China
2. Department of Development Planning and Assets Management, China State Forestry Administration, Beijing 100714, China
3. Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, Beijing 100091, China
4. Institute of Silviculture, Albert-Ludwigs-Universität Freiburg, Tennenbacherstrasse 4, Freiburg 79106, Germany