A poster hung at the entrance of an apartment building quickly became one of the most talked-about posts on X. The poster, featuring a photograph, a prohibited sign, and a rather formal tone, announced that a black cat was forbidden from entering the building. The reason was clearly stated: the cat was no longer allowed inside because it had been harming another cat living in the building. The residents hadn't completely written off the cat; they noted that they continued to feed it with food and water in its living area outside. Nevertheless, the seriousness of the poster and the cat's photograph staring intently at the camera reminded many of escaped convict announcements. Some brought up the cat's criminal record, while others talked about the unruly cats in their own buildings.