The GMRT H I 21 cm moment-0 image at an angular resolution of ﹩3\mathop{.}\limits^{^{\prime\prime} }0﹩ (contours), overlaid on the DECaLS g-band image (color scale; A. Dey et al. 2019). The axes are relative to the center of NGC 4141, with the magenta star and diamond indicating the locations of, respectively, FRB 20250316A and the X-ray transient (H. Sun et al. 2025a). The lowest contour is at the 3σ H I column density sensitivity of the spectral cube, 9.6 × 10²⁰ cm⁻² per 10.4 km s⁻¹ channel, with subsequent contours increasing by factors of 1.5, and the highest contour at an H I column density of 7.3 × 10²¹ cm⁻². (B) A zoom-in on the maroon dashed square shown in (A); the magenta plus sign indicates the location of the SDSS spectrum, shown in the bottom panel, (C). In panels (A) and (B), the gray circle in the inset at the bottom left indicates the GMRT synthesized beam.