This research was funded by the Hainan Province Science and Technology Major Project (No. ZDKJ2016003 ), the Hainan Province Applied Technology R&D and Demonstration Project (No. ZDXM2015013 ), the Hunan Province Xiangtan City Key Project (No. NY-ZD20161002 ), and the Xiangtan Science and Technology Commissioner Project (No. CXY-TPZJ20171020 ). The authors thank the staff at Hunan Qingke Biotech Co., Ltd. and Professor Yuan-Liang Wang's experimental team from the College of Food Science and Technology, Hunan Agricultural University for their assistance.