1. Shanghai Astronomical Observatory, Chinese Academy of Sciences , Shanghai 200030, People’s Republic of China
2. Research School of Astronomy and Astrophysics, Australian National University , Canberra ACT 2601, Australia
3. University of Chinese Academy of Sciences , 19A Yuquan Road, Beijing 100049, People’s Republic of China
4. School of Physics, Zhejiang University , Hangzhou, 310027, People’s Republic of China
5. Kavli Institute for Astronomy and Astrophysics, Peking University , Beijing 100871, People’s Republic of China
6. Department of Astronomy, School of Physics, Peking University , Beijing 100871, People’s Republic of China