First of all, Wei Xiaobao is very interesting. He often practices martial arts with Kangxi.
Wei Xiaobao was next to Hai Dafu when he entered the palace. Once Wei Xiaobao accidentally broke into the emperor's training room, but he didn't know the emperor, so he played with him, and the emperor began to remember the little eunuch. Finally, the little eunuch helped him do a lot of things, so the relationship became better and better.
Second, Wei Xiaobao helped Kangxi get rid of the threat of Ao Bai, so that Kangxi could be proclaimed emperor smoothly.
No matter in the official history or in this kind of film and television drama, Ao Bai is a menace to Kangxi. In this film and television drama of Duke Lushan, Ao Bai was removed by Wei Xiaobao and Kangxi, so Wei Xiaobao was reused by Kangxi, and finally the relationship would get better and better.
Third, Wei Xiaobao helped Kangxi solve many troubles in the process of becoming an official.
Another reason is that Wei Xiaobao helped Kangxi solve many troubles. For example, Wu Sangui and some foreign enemies were harassed by Wei Xiaobao, and Wei Xiaobao was welcomed by many people in the process of becoming an official, so the relationship with Kangxi became better and better.
I think Wei Xiaobao is a very interesting person in many martial arts dramas. He has no martial arts, but he still gets along well.