Observed spectrum of the C IV emission-line region (black line) and best-fitting model (red line). The best-fitting individual components are also shown: the dashed blue line is the combined intrinsic continuum and Balmer pseudo-continuum model; the magenta line is the Gaussian component; and the gray line is the iron pseudo-continuum. For reference, the orange line represents the composite spectrum of z > 5.7 QSOs of Shen et al. (2019), and the vertical dashed line marks the expected location of the C IV emission line assuming the systemic redshift of z = 6.025. The observed blueshift of ≈1000 km s⁻¹ is consistent with typical values of z > 6 QSOs.