1. Department of Biology, Chengde Medical University, Hebei Province, Chengde, PR China
2. College of Ecology and Environment, Hainan Tropical Ocean University, Sanya, PR China
3. Department of Chemical Engineering, Chengde Petroleum College, Chengde, PR China
4. Department of Functional Center, Chengde Medical University, Hebei Province, Chengde, PR China
5. Hemorheology Center, Chengde Medical University, Hebei Province, Chengde, PR China
6. Institute of Sericulture, Chengde Medical University, Hebei Province, Chengde, PR China