Zoom-in plots from the more central region in G351. The two left panels show the ALMA-IMF data (Motte et al. 2022; Ginsburg et al. 2022; Cunningham et al. 2023) from the first zoom-region (black box in Fig. 1). The color-scale in the left and middle panels are the 1st moment maps in H₂CO and DCN. The contours show the 1.3 mm continuum emission starting at 4σ and continue in 8σ steps (1σ=0.6mJybeam⁻¹). The ellipses in the middle panel outline the areas used for the mass flow rate estimates, and the red arrow shows the direction of the red-shifted outflow lobe from Beuther et al. (2017). The right panel then shows the final zoom-in (magenta boxes in middle panel and Fig. 1) data from the DIHCA and high-resolution studies (Olguin et al. 2021; Beuther et al. 2019) with the H₂CO 1st moment map in color-scale and the 1.3 mm continuum data in contours (5–25σ in 5σ steps with 1σ=60 µJybeam⁻¹). The arrow in the right panel marks the direction of the position–velocity cut in Fig. 4. Linear scale-bars are shown in the middle and right panels, synthesized beams are presented in the bottom- and top-left corners of the respective panels.