How did Xia Yingying know about Xia?

In order to achieve the goal of entering the palace, I did my homework.

1. In the TV series Princess Zhu Huan 3, Xia Yingying did his homework and achieved the goal of entering the palace, knowing the story of the emperor and Xia, and knowing that he looks like Xia.

2. The TV series Princess Zhu Huan 3 was directed by Ping Li and Ding, starring Crystal and Quidditch, and was released on July 7th, 2003.