Three-color image of G286 constructed by combining Spitzer IRAC 3.6 (blue) and 8.0 (green) μm and Herschel PACS 70 μm (red). Black contours show the 1.3 mm continuum image combining ALMA 12 and 7 m array data (with a resolution of 1.″62 × 1.″41). The contour levels are 1σ × (4, 10, 20, 50, 100) with σ = 0.45 mJy beam⁻¹. Gray contours show the 1.3 mm continuum image with only 7 m array data (with a resolution of 7.″32 × 4.″42, shown in the lower left corner). The contour levels are 1σ × (4, 10, 20, 50, 100) with σ = 1.7 mJy beam⁻¹. The positions of three filamentary structures are marked in blue text. The G286 field is divided into five strips, as shown by the green rectangles. Each strip is covered with 147 pointings of the 12 m array. The large white ellipse denotes the boundary defined by Mopra HCO⁺(1–0) emission (Barnes et al. 2011), with the major and minor axes equal to twice the FWHM lengths of the 2D Gaussian fits to its emission. Two smaller ellipses indicate the approximate boundaries of two subregions with distinct radial velocities revealed by multiple gas tracers.