Best descriptions (solid red line) of the asymmetric broad Hβ by the elliptical accretion disk model. The dots plus error bars show the broad Hβ after we removed the optical Fe II emission features and the AGN continuum emissions. The dashed red line shows the expected line profile of the broad Hβ around 2030, under the assumption that disk-like BLRs lie in the central accretion disk in SDSS J1251+0613.