Origin and development: "bento" originally meant that after the extras finished the play, they could take a bento with the crew. The popularity of this word in China is probably attributed to Zhou Xingxing's great "comedy"-"king of comedy". In the play, in order to get a lunch only for actors, star students play the roles of "corpse A" and "killed passerby B" again and again. Later, the word "bento" extended to the field of animation, meaning that the character died or disappeared or his whereabouts were unknown.

Later, "bento" became the exclusive synonym for the death of the character-the guy who was destroyed "held the bento"; Killing someone else's family is "sending a box lunch to XX".