Panel 1: multi-wavelength light curves of the GRB 100219A afterglow. The X-ray light curve at 1 keV is represented by empty circles (dark blue: WT data; light blue: PC data). The values in the plot are 10 times lower than the real ones for presentation purposes. The GMG and NOT R-band data are denoted by dots (red: GMG data; pink: NOT data). The I-band datum from the NOT is indicated by a diamond (orange color). The GAO 150 cm R_C and I_C band observations are denoted by empty squares (green color). The Akeno and Okayama MITSuME optical I_C-band observations are denoted by crosses (black color). The GROND i′-band observation is marked with a triangle (green color). Panel 2: the whole X-ray light curve fitting from about 100 s to 4 × 10⁴ s after the burst trigger and two X-ray bumps are included in the fitting. Panel 3: the fitting of optical R-band light curve of GMG and NOT observations from about 1000 s to 2 ×  10⁵ s after the burst trigger and the late optical bump is included. Panel 4: the fitting of optical I_C band light curve of MITSuME observation from about 400 s to 6000 s after the burst trigger and the early optical bump is clearly shown. The solid line in each panel is the light curve fitting result.