JCMT MALATANG observed positions for M82 overlaid on HST Hα emission (NASA, ESA, The Hubble Heritage Team, Mutchler et al. 2007). The yellow circles indicate to the spatial areas covered by the JCMT HARP receivers using jiggle mode, and the galaxy’s center is marked by a red circle. The 9 × 9 JCMT MALATANG observation of HCN(4–3) and HCO⁺(4–3) is represented by the blue box. In this study, we define the region enclosed by the red rectangle as the area dominated by the disk of M82, which is slightly larger than the CO molecular disk described in Walter et al. 2002 and Salas et al. 2014. Following the definition of the outflow regions in Leroy et al. 2015 based on CO, Hα, FUV, and X-ray emission, we represent the regions associated with outflow as a conical structure with a base of 300 pc and an opening angle of 20°, as indicated by the red dashed lines.