Velocity-integrated intensity channel maps of the MWISP ¹²CO (1–0) emission. In each panel, contour levels start at 5σ, then increase in steps of 3σ, where the 1σ level is ~0.25 K km s^-1. The integrated velocity range is written in the top right corner of each panel (in km s^-1). The red circle shows the position and size of the shell-like structure in Tycho’s SNR, while the yellow dashed ellipse shows the cavity found in the MWISP CO images.