Funding for this research was provided by:
National Natural Science Foundation of China (61972333)
National Natural Science Foundation of China (61802328)
National Natural Science Foundation of China (61771415)
Natural Science Foundation of Hunan Province (2019JJ50606)
Scientific Research Foundation of Hunan Provincial Education Department (19B561)
Baidu Pinecone Program
Article History
Received: 23 November 2019
Revised: 22 July 2020
Accepted: 12 August 2020
First Online: 10 September 2020