K-Cor images of 2021 May 07 CME. The dashed cyan line shows the eruption direction of the bright core. The white point and yellow cross in panel b have the same meaning as in Fig. 1b. The solid cyan line indicates the width of the bright core. The dashed red line represents part of a circle with a center at the solar center, which is tangent to the CME leading front, while the yellow asterisk marks its position. The solid red line shows the width of the CME bubble. Purple arrows mark the positions of the interaction between the CME front and streamer. (An animation of this figure is available online.)