1. School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
2. College of Electrical and Electronic Engineering, Wenzhou University, Wenzhou 325035, P. R. China
3. College of Food and Biological Engineering, Jimei University, Xiamen 361021, P. R. China
4. Fujian Bama Tea Industry Co., Ltd., Quanzhou 362442, P. R. China