1. Institute Arts, Sanya University, Sanya, Hainan, China;
2. School of Life Science and Technology, Lingnan Normal University, Zhanjiang, Guangdong, China ;
3. Hainan Provincial Forestry Project Management Office, Haikou, Hainan, China;
4. College of Forestry, Hainan University, Haikou, Hainan, China