LAMOST Medium-Resolution Spectral Survey of Galactic Nebula (LAMOST
  MRS-N): An overview of Scientific goals and Survey plan
  Since Sep. 2018, LAMOST started the medium-resolution (R $\sim 7500$)
spectral survey (MRS). We proposed the spectral survey of Galactic nebulae,
including \hii\ regions, HH objects, supernova remnants, planetary nebulae and
the special stars with MRS (LAMOST MRS-N). LAMOST MRS-N covers about 1700
square degrees of the northern Galactic plane within $40^\circ < l < 215^\circ$
and $-5^\circ < b < 5^\circ$. In this 5-year survey, we plan to observe about
500 thousand nebulae spectra. According to the commissioning observations, the
nebulae spectra can provide precise radial velocity with uncertainty less than
1 km s$^{-1}$. These high-precision spectral data are of great significance to
our understanding of star formation and evolution.
