Funding for this research was provided by:
the National Nature Science Foundation of China (No. 61672201)
the Natural Science Foundation of Anhui Province of China (No. 1708085MF158)
the China Scholarship Council (No.201706695044)
Article History
Received: 22 March 2018
Revised: 10 June 2019
Accepted: 2 August 2019
First Online: 31 August 2019