The rest-frame NIRSpec spectrum of Q2343-NB2929. Top: 2D spectrogram of the source, with key emission lines denoted by red vertical lines. The panel on its right shows the 1D spatial distribution of the emission lines (orange line) and the Gaussian fit used for optimal extraction. Middle: full spectral range of the G235M spectrum for the source. Dashed lines and pink shaded bands indicate the positions of emission lines highlighted in the bottom panels. The 1D extracted spectrum is shown in purple. Bottom: the zoom-in panels of key spectral features. The Gaussian+linear continuum fit to the emission lines is shown in blue, and the error is shown as a gray region.