Funding for this research was provided by:
National Natural Science Foundation of China Program (No. 51602111)
Natural Science Foundation of Guangdong Province (2018A030313739)
Cultivation project of National Engineering Technology Center (2017B090903008)
Xijiang R&D Team (X.W.), Guangdong Provincial Grant (2017A050506009)
Special Fund Project of Science and Technology Application in Guangdong and 111 project (2017B020240002)
Article History
Received: 11 November 2019
Accepted: 14 January 2020
First Online: 22 January 2020
Competing Interests
: The authors declare that they have no competing interests.