The research of Yanchun Yi is supported by Hunan Provincial Natural Science Foundation of China (2018JJ4024), and the Key Projects of Hunan Provincial Education Department (18A3400). The research of Pingyan Chen is supported by the National Natural Science Foundation of China (No. 71471075). The research of Soo Hak Sung is supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2017R1D1A1B03029898).
