Yunnan Observatories;
Chinese Academy of Sciences;
Kunming 650216;
China;
Key Laboratory for the Structure and Evolution of Celestial Objects;
Chinese Academy of Sciences;
Kunming 650216;
China;
Nanjing Institute of Astronomical Optics&Technology;
National Astronomical Observatories;
Chinese Academy of Sciences;
Nanjing 210042;
China;
The Institute of Optics and Electronics;
Chinese Academy of Sciences;
Chengdu 610209;
China;
Key Laboratory of Optical Astronomy;
National Astronomical Observatories;
Chinese Academy of Scienccs;
Beijing 100101;
China;
University of Chinese Academy of Sciences;
Beijing 100049;
China;
Instrumentation:spectrographs; methods:observational; techniques:spectroscopic;