  Using the Purple Mountain Observatory Delingha (PMODLH) 13.7 m telescope, we
report a 96-square-degree 12CO/13CO/C18O mapping observation toward the
Galactic region of l = [139.75, 149.75]$^\circ$, b = [-5.25, 5.25]$^\circ$. The
molecular structure of the Local Arm and Perseus Arm are presented. Combining
HI data and part of the Outer Arm results, we obtain that the warp structure of
both atomic and molecular gas is obvious, while the flare structure only exists
in atomic gas in this observing region. In addition, five filamentary giant
molecular clouds on the Perseus Arm are identified. Among them, four are newly
identified. Their relations with the Milky Way large-scale structure are
discussed.
