Sorry, I just saw the post. It is difficult to repair the place hit by LZ, and the edge of the back cover is double-folded, so it is difficult for ordinary sheet metal to recover. The practice of 4S is to fill the original body appearance with brown plastic electric mi (this word can't be typed) in the concave place after a little plastic shaping, and finally paint it. Another method is to suck out the concave place with the sucker hit by the reverse force, but this method is very, very difficult to do at this position.