Why didn't anyone who had seen the emperor recognize that the emperor was not the king of Guo County?

In ancient times with strict hierarchy, lower-level officials could not look the dragon in the face directly, otherwise it would be a crime of disrespect. What's more, the female xiu is just a civilian, with no official or post, and dare not offend her. In addition, the platform of the draft is far away from the emperor, in order to prevent someone from being assassinated. So she never saw the emperor's face, even if she did, she just waved it and couldn't see it clearly.