Yunnan Observatories Chinese Academy of Sciences Kunming 650011 China;
Key Laboratory for the Structure and Evolution of Celestial Objects Chinese Academy of Sciences Kunming 650011 China;
Graduate University of Chinese Academy of Sciences Beijing 100049 China;
Key Laboratory for Research in Galaxies and Cosmology University of Science and Technology of China Hefei 230026 China;
Center for Astrophysics University of Science and Technology of China Hefei 230026 China;