tokens: We would are deeply grateful to our colleagues who have provided us with valuable guidance. Special thanks to Professor Cui X. Q. (NIAOT) and Professor Granham J. Murray (Durham University) for productive discussions. Without their enlightening instruction, impressive kindness and patience, this paper could not have been completed. The Guoshoujing Telescope (the Large Sky Area Multi-Object Fiber Spectroscopic Telescope, LAMOST) is a National Major Scientific Project built by the Chinese Academy of Sciences. Funding for the project has been provided by the National Development and Reform Commission. LAMOST is operated and managed by the National Astronomical Observatories, Chinese Academy of Sciences.
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