Velocity-integrated intensity image with typical spectra over three individual velocity ranges, left: [−2, 7], middle: [−14, −2], and right: [−45, −30] km s⁻¹. The top panel of each image displays intensity maps derived from CO observations. The color scale ranges from 3σ, as indicated on the color bar. The purple dashed contours represent Urumqi λ 6 cm radio continuum emission, as in Fig. 1. The orange and green circles represent the LHAASO source 1LHAASO J0428+5531, with orange indicating KM2A components and green denoting WCDA components. The lower panel shows the average spectra for the highlighted region, where the blue and red spectra represent ¹²CO and ¹³CO, respectively.