This is the introduction of the catalog.

The keywords starting with "combined" originate from LAMOST; relevant documentation can be referenced at https://www.lamost.org/dr11/v1.1/doc/lr-data-production-description.
combined_obsid--Unique spectra ID in LAMOST DR11 low-resolution.
combined_uid--Unique object ID in LAMOST DR11 low-resolution.
combined_class--Spectral type in LAMOST DR11 low-resolution.
combined_subclass--Stellar spectral type in LAMOST DR11 low-resolution.
combined_z--The value field shall contain a real floating-point number providing redshift for a target, which is determined mainly by the LAMOST spectra analysis pipeline. If the quality of a spectrum is poor, its redshift is artificially set to -9999 by LAMOST.
combined_ra--The value field shall contain a non-negative real floating-point number, which gives the right ascension of target from the input catalog. The data is sourced from LAMOST.
combined_dec--The value field shall contain a real floating-point number, which gives the declination of target from the input catalog. The data is sourced from LAMOST.
combined_feh--Metallicity obtained by the LAMOST Stellar Parameter Pipeline (LASP).
combined_teff--Effective temperature obtained by the LAMOST Stellar Parameter Pipeline (LASP).
combined_logg--Surface gravity obtained by the LAMOST Stellar Parameter Pipeline (LASP).
combined_rv--Heliocentric radial velocity obtained by the LASP.
combined_snrg--Signal-to-noise ratio in the g-band from LAMOST DR11.
Teff--The estimated Effective temperature in this paper.
logg--The estimated Surface gravity in this paper.
FeH--The estimated Metallicity in this paper.
CH--The estimated carbon abundance [C/H] in this paper.
CFe--The estimated [C/Fe] ratio in this paper.
EGP--The EGP index calculated based on the LAMOST DR11 low-resolution spectra.
recommend_1--Indicates the spectral quality from LAMOST DR11 low-resolution spectra, with a value of 1 representing good quality (SNR_g > 35 and z != -9999).
recommend_2--Indicates whether the star is a "unpolluted" main-sequence CEMP star (value=1) or an "polluted" evolved (giant) CEMP star with diluted surface carbon due to internal mixing (value=0).
recommend_3--Indicates the classification confidence of the CEMP candidate, derived from Monte Carlo simulation.  The value ranges from 0 to 1, with higher values indicating greater confidence that the star is a CEMP star (i.e., less sensitive to parameter estimation errors).
recommend--recommend – The sum of recommend_1, recommend_2, and recommend_3. Samples with recommend greater than 2.7 are reliable CEMP candidates (good spectral quality, main-sequence phase, and high classification confidence).