Brother Thirteen is the prince of Yong Zhengdi, and their relationship is very good. Later, 13 also helped Yong Zhengdi compete for the reserve team. After Yong Zhengdi succeeded to the throne, he shared the state affairs for Yong Zhengdi on May 13th, and finally he ran out of energy during his term of office. Therefore, after Yong Zhengdi succeeded to the throne, he liquidated his brothers who competed with him for more wealth, but only on May 13th, he was not liquidated, and he was also reused by Yong Zhengdi.

Brother XIII was also very popular with Emperor Kangxi in his early days, but his biological mother was not high, and he himself was used to being free. In addition, Emperor Kangxi had many sons, many of whom were very capable and talented, so Brother XIII gradually faded out of the sight of Emperor Kangxi. But 13th has been friends with Yong Zhengdi since childhood, and he has been following Yong Zhengdi since he became an adult.

At first, Yong Zhengdi supported the prince, but later, after the prince was abolished, Yong Zhengdi became ambitious for the throne. At this time, thirteen elder brother became Yong Zhengdi's staunchest follower. Although May 14 is Yong Zhengdi's half-brother, May 14 is more friendly to May 18. May 14 became the best candidate for storage after being rejected by Kangxi emperor. Therefore, May 14 and the two brothers had already become a pair of sworn enemies fighting for the throne. In the end, Yong Zhengdi won, so although May 14th was his half-brother, after all, he was the one who competed for the throne with himself, so Yong Zhengdi was imprisoned on May 14th after he ascended the throne.

And the 13th brother, because he has been following Yong Zhengdi, is Yong Zhengdi's most trusted brother, so later he was not liquidated by Yong Zhengdi, but was entrusted with an important task by Yong Zhengdi.