Top left panel: Dependence of FWHM(Hβ) on R_FeII for SDSS J1251+0613 (solid circle plus error bars in red) and the collected 576 SDSS normal quasars (smaller solid circles plus error bars in dark green). Top middle panel and top right panel: BH mass distribution and Eddington ratio distributions of the collected 1642 SDSS normal quasars. In the top middle panel and top right panel, the solid line in red shows the Gaussian fitting results to the distribution, and the vertical dashed red line marks the position for the SDSS J1251+0613. The bottom left panel shows the dependence of α_Hβ on the continuum luminosity, and the solid red circle shows SDSS J1251+0613. The bottom middle panel shows the IR color properties from WISE (symbols in dark green) and 2MASS (symbols in cyan). In the bottom middle panel, the solid circle plus error bars in red and blue show the WISE and 2MASS results for SDSS J1251+0613. The bottom right panel shows the NUV (in dark green) and FUV (in cyan) band magnitude distributions, and the solid line in red and blue shows the Gaussian fitting results to the distributions. In the bottom right panel, the vertical dashed line in red and blue shows the NUV and FUV magnitudes for SDSS J1251+0613.