Funding for this research was provided by:
Research Grants Council of Hong Kong (GRF 17302514)
National Natural Science Foundation of China (11501376)
Guangdong Province Natural Science Foundation (2015A030310241)
Natural Science Foundation of Shenzhen University (201541)
Natural Science Foundation of Shandong Province (ZR2015AM010)
National Natural Science Foundation of China (61672330)