Funding for this research was provided by:
the Natural Science Foundation of Guangdong (2015A030313638)
the Frontier and Key Technology innovation of Guangdong (2016B010113004)
The Characteristic Innovation Project of the Department of Education of Guangdong province (2016KTSCX147)
The Youth Creative Talents Program of the Department of Education of Guangdong province (2015KQNCX179)
the Science Research Project of Foshan University