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In the past, did courtiers joke with the emperor in their spare time?

I can joke, but the emperor can joke with officials at will, but officials can't make disrespectful jokes about the emperor. For example, as you said, the emperor is stupid, and when he meets a grumpy emperor, he pulls it out and hacked to death. Therefore, it is good for officials to properly grasp the scale of joking with the emperor, or they will not open it, or their lives will be in danger!