  A catalog of more than 43,000 M giant stars has been selected by Li et al.
from the ninth data release of LAMOST. Using the data-driven method SLAM, we
obtain the stellar parameters (Teff, logg, [M/H], [$\alpha$/M]) for all the M
giant stars with uncertainties of 57 K, 0.25 dex, 0.16 dex and 0.06 dex at SNR
> 100, respectively. With those stellar parameters, we constrain the absolute
magnitude in K-band, which brings distance with relative uncertainties around
25% statistically. Radial velocities are also calculated by applying cross
correlation on the spectra between 8000 A $\AA$ and 8950 A $\AA$ with synthetic
spectra from ATLAS9, which covers the Ca II triplet. Comparison between our
radial velocities and those from APOGEE DR17 and Gaia DR3 shows that our radial
velocities have a system offset and dispersion around 1 and 4.6 km s$^{-1}$,
respectively. With the distances and radial velocities combining with the
astrometric data from Gaia DR3, we calculate the full 6D position and velocity
information, which are able to be used for further chemo-dynamic studies on the
disk and substructures in the halo, especially the Sagittarius Stream.
