Funding for this research was provided by:
National Natural Science Foundation of China (61533008, U1501251)
National Natural Science Foundation of China (61520106009, 61773373)
National Natural Science Foundation of China (61773284)
Natural Science Foundation of Tianjin City (14JCQNJC05400)
Natural Science Foundation of Beijing Municipality (4162065)
China Post-doctoral Science Foundation (2014M561559)