Why is Mu Dan written on the barrage instead of Tan Mu?

Barrage refers to a curtain formed by a large number of bullets. When a lot of comments pass by the screen, the effect looks like a barrage in flight shooting's game, so read Mu Dan.

Barrage, a popular Chinese word, refers to the critical subtitles that pop up when watching videos on the Internet.

Similar to the criticism between the lines in the novel, the comments floating between the screens in the video are called barrage, which originally meant to provide intensive shelling with a large number or a small number of artillery.

The barrage originated from Japanese barrage video sharing website (niconico animation). AcFun (content diversity) was first introduced to China, and then Bili Bili (new secondary barrage network).

When a large number of spit comments floated across the screen, the effect looked like a barrage in flight shooting's game, so NICO netizens made this effect a barrage.

In China, it used to be called barrage only when a large number of comments appeared at the same time, but with the misuse of a single comment, it can also be called barrage.

Source: barrage (film review) _ Baidu Encyclopedia