Acknowledgements. This research was funded by the National Natural Science Foundation of China, grant number 61402220, the Philosophy and Social Science Foundation of Hunan Province, grant number 16YBA323, the Scientic Research Fund of Hunan Provincial Education Department for excellent talents, grant number 18B279, the key program of Scientic Research Fund of Hunan Provincial Education Department, grant number 19A439, the Project supported by the Natural Science Foundation of Hunan Province, China, grant number 2020JJ4525.