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The discovery of Li-rich giant has cast a new challenge for the standardstellar evolution models, and to resolve this issue, the number of this typeobject has been rapidly increased because of the development of worldwidesurveys these days. Taking advantage of the Large Sky Area Multi-Object FiberSpectroscopic Telescope survey, 44 newly Li-rich giants are reported, which areconfirmed with high-resolution observations. Based on the high-resolution andhigh signal-to-noise spectra, we derived the atmospheric parameters andelemental abundances with the spectral synthesis method. We performed adetailed analysis of their evolutionary stages, infrared excess, projectedrotational velocity (v sin i), and the stellar population. We find that (1) TheLi-rich giants concentrate at the evolutionary status of the red giant branchbump, red clump, and asymptotic giant branch; (2) Three of them are fastrotators and none exhibit infrared excess. Our results imply that the originsof Li enrichment are most likely to be associated with the extra mixing in thestellar interior, and the external sources maybe only make a minorcontribution. Moreover, various Li-rich episodes take place at differentevolutionary stages.

High-resolution spectroscopic analysis of a large sample of Li-rich giants found by LAMOST