Appearance of the five homologous flares. (a1)–(a5) GOES soft X-ray flux in 1−8 Å showing the M1.4, M4.7, M4.1, M5.7, and M1.7 flares. (b1)–(b5) AIA 1600 Å and (c1)–(c5) AIA 94 Å images showing the five flares in UV and EUV wavelengths, respectively. The vertical lines in the top panels mark the peak times of the flares. The arrows labeled “1”, “2”, “3”, and “4” in the middle panels denote the erupting materials, the circular ribbons, the parallel ribbons, and the remote brightenings, respectively. The red and white arrows in the bottom panels indicate the bright kernels and large-scale loops, respectively.