  222 hot subdwarf stars were identified with LAMOST DR8 spectra, among which
131 stars show composite spectra and have been decomposed, while 91 stars
present single-lined spectra. Atmospheric parameters of all sample stars were
obtained by fitting Hydrogen (H) and Helium (He) line profiles with synthetic
spectra. Two long-period composite sdB binaries were newly discovered by
combining our sample with the non-single star data from Gaia DR3. One of the
new systems presents the highest eccentricity (i.e., 0.5 +/- 0.09) among known
wide sdB binaries, which is beyond model predictions. 15 composite sdB stars
fall in the high probability binary region of RUWE-AEN plane, and deserve
priority follow-up observations to further study their binary nature. A
distinct gap is clearly presented among temperatures of cool companions for our
composite-spectra sample. But we could not come to a conclusion whether this
feature is connected to the formation history of hot subdwarf stars before
their binary natures are confirmed.
