1. School of Physics and Electronics, Nanning Normal University, Nanning, China
2. Key Laboratory of New Electric Functional Materials of Guangxi Colleges and Universities, Nanning Normal University, Nanning, China
3. Key Laboratory of Environmental Evolution and Resource Utilization of the Beibu Gulf, Ministry of Education & Guangxi Key Laboratory of Earth Surface Processes and Intelligent Simulation, Nanning Normal University, Nanning, China
4. Guangxi Technical Instruction Office for Fruit, Nanning Normal University, Nanning, China