Top panel: light curves and fits of the multi-wavelength observation of GRB 190114C with the synchrotron forward-shock and SSC reverse-shock models. Bottom panel: the broadband SED of the X-ray and optical (UVOT) observations during the period of 5539–57216 s. The solid black line is the best-fit curve from XSPEC. The shaded period in the upper panel corresponds to the spectrum on the lower panel.