Sloan Digital Sky Survey spectra of SDSS J0012-1022 with MJD = 52141 (in blue) and 56628 (in red). Dashed lines in blue and in red show the power-law function determined optical continuum emissions underneath broad Hβ through the two regions filled by dark green lines. The dashed purple line represents the first component related to the obscured power law component, shown as a dashed blue line with E(B-V) = 0.1, and the dashed dark green line shows the second component (formula listed in dark green characters) from the other system accreting one BH. The sum of the two components is one solution related to a sub-pc BBH to the continuum emissions in the spectrum with MJD = 56628.