1. College of Traditional Chinese Medicine Guangdong Pharmaceutical University Guangzhou P.R. China
2. Guangdong Provincial Key Laboratory of Biomedical Imaging The Fifth Affiliated HospitalSun Yat‐sen University Zhuhai P.R. China
3. College of Pharmacy Guilin Medical University Guilin P.R. China
4. Tea Technology Research Department Wuzhou Institute of Agricultural Sciences Wuzhou P.R. China