Funding for this research was provided by:
Natural Science Foundation of China (11847209, 11675113)
Natural Science Foundation of China (11635009)
Key Project of Beijing Municipal Commission of Education (KZ201810028042)
Ministry of Science and Technology of the Peoples’ Republic of China (2015CB856703)
Strategic Priority Research Program of the Chinese Academy of Sciences (XDB23030100)
Article History
Received: 14 May 2019
Accepted: 27 January 2020
First Online: 4 February 2020