1. Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, Kunming, 650216, China
2. Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, Kunming, 650216, China
3. Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, China
4. University of Chinese Academy of Sciences, 100049 Beijing, China/Yuquan Road 19#, Sijingshang Block, Beijing, 100049, China
5. Sternberg Astronomical Institute, Moscow State University, Universitetskij prospect 13, Moscow 119992, Russia