There are two meanings, depending on the circumstances in which it is said: the first interpretation of "catching a cat" is that the first person caught by a child during hide-and-seek is "Elvis", and "Elvis" is The next round is to look for people who are hiding and seeking in the dark; the second explanation of "Catching Cats" is that the Public Security Bureau goes to catch people engaged in prostitution in a certain place, and "Elvis" is the leader who provides all the conditions for prostitution.