Why was Yin Ren, the son of Kangxi, abolished?

I don't need to explain to you how serious it is for Jiuzi to seize the office. In the end, he was either a winner or a leisurely prince who didn't participate in political affairs at all. But in this battle, the second son of Kangxi, who had the best chance of winning, experienced two wastes. So why did this abandoned prince offend Kangxi so much and get Kangxi's favor so much?

In ancient China, there were different levels. Generally speaking, the queen's first son is called the eldest son. The advantage of the eldest son is very great. Under normal circumstances, the eldest son is the default prince, the future Chu Jun, and the Yin people are the eldest sons of Emperor Hershey, Kangxi's first wife. He died young when Queen hershey was born. Kangxi and Hershey Empress are young couples with deep feelings. Therefore, when Hershey was dying, Kangxi ordered Yin Ren to be the Crown Prince, which was also an explanation for the Queen.

Kangxi cultivated the prince more than any other son and was very keen on the education of the prince. When these brothers were young, they were not so serious. Later, when they grew up, the talent of the prince gradually became less prominent in front of all the brothers, so other brothers gradually became envious of the throne, and many gangs were formed. Among them, the group of Lao Ba is the strongest, and the image of the prince is always vilified in TV dramas, which is still very powerful in history. However, in the TV series, he has always been a failed heir, colluding with the concubines in the harem and making trouble in the political affairs of the DPRK. When Kangxi's favorite died on May 17th, the prince was not half a brother, and he didn't know how to restrain himself. Kangxi was so disappointed in him that the prince was finally abolished.

Later, the vassal disputes continued. Kangxi looked tired and had feelings for the abandoned prince, so he re-established him as the prince, but these brothers did not stop there and disputes continued. The prince was afraid of losing his throne again and simply rebelled, but in the end he failed and the throne was completely gone.