We are grateful to the NNSFC (21472057, 21472058, 21622201 and 21772053), the Science and Technology Department of Hubei Province (2016CFA050 and 2017AHB047), and the Program of Introducing Talents of Discipline to Universities of China (111 Program, B17019) for support of this research. We offer special thanks to Profs. Axel Jacobi von Wangelin and Burkhard Kçnig for valuable discussions and suggestions.