What does it mean when a treacherous person laughs before speaking?

There are generally many kinds of laughter. Sometimes we can also analyze whether a person is a good person based on his laughter, because when people laugh, they often have many hidden emotions in their hearts. Not only happy people will laugh, but sad people will also laugh, helpless people will also laugh, and treacherous people will naturally laugh too. Then let’s look at physiognomy to see what it means when a treacherous person laughs before speaking?

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