My friend sent me a short message, which ended with "Ha!" What do you mean by the word? Thank you very much

This "ha" is popular in the last two years. Many people always put a "ha" at the end of a sentence when they talk online. This is the speaking habit of southerners, with modal particles; Or the speaker is in a good mood. In Sichuan dialect, there is a meaning of request, such as "wait for me", and in East Sichuan dialect and Chongqing dialect, there is a meaning of "stupid". For example, "this person is stupid" means that this person is stupid; & lt Mr. Hal > The mood can be expressed by the word "O(∩_∩)O".