1. Key Laboratory of Pu-er Tea Science, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China
2. College of Science, Yunnan Agricultural University, Kunming 650201, China
3. College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China
4. State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Kunming 650201, China