Blue line challenge is a software Tik Tok, and blue line challenge is a special effect of Tik Tok. When a blue line sweeps across the video, things in the video will be deformed. It is not easy to get the desired effect by using this special effect, which leads to doubts from netizens.

This special effect can turn a bill into a pile of bills, and can also change any part of the body. However, this special effect can easily turn itself into a monster in the video, which is very sand sculpture and is called a large-scale challenge rollover scene.