Velocity-spatial structures and CO spectra of MC G150.6+03.7. Lower-left: velocity-integrated intensity image of MC G150.6+03.7 masked by DBSCAN shown with the blue-filled contour with the contour level of [0.66, 4.62, 8.58, 12.54, 16.5, 20.46, 24.42] K km s⁻¹ , and the black dashed contour is the Urumqi λ 6 cm radio emission with the same contour level as in Fig. 2. Lower-right: latitude–velocity diagram of the whole area (yellow-filled contour) and MC G150.6+03.7 (blue-filled contour). The yellow-filled contour level is [−0.5, 0.2, 1.2, 2.2, 3.2, 4.2, 5.2, 6.2, 7.2, 8.2, 9.2, 12] K, and the blue-filled contour level is [0.2, 1.2, 2.2, 3.2, 4.2, 5.2] K. Upper-left: longitude–velocity diagram with the same colour and level setting as the latitude–velocity diagram. Upper-right: average ¹²CO (blue) and ¹³CO (red) spectra extracted from the MC G150.6+03.7 region.