tokens: The authors thank the anonymous referee for useful comments that improved this paper. We also thank Jane Lin for helpful discussions on stellar mass for the Li-rich giants. This research was supported by the National Key Basic Research Programme of China 2014CB845700, and by the National Natural Science Foundation of China under grant Nos. 11833006, 11603037, and 11473033. This work is supported by the Astronomical Big Data Joint Research Center, cofounded by the National Astronomical Observatories, Chinese Academy of Sciences and the Alibaba Cloud. K.P. acknowledges support from the Mt. Cuba Astronomical Foundation Grant and from Center for Astronomical Megascience, CAS. 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. This publication makes use of data products from the Wide field Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration. Based on data products from observations made with ESO Telescopes at the La Silla Paranal Observatory under programme ID 188.B-3002. This research made use of Astropy, a community-developed core Python package for Astronomy. Software: Astropy (Astropy Collaboration et al. 2013 , 2018 ), PARAM (da Silva et al. 2006 ), SPECTRUM (Gray Corbally 1994 ), MARCS (Gustafsson et al. 2008 ).
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