1, the first time is:

Emperor Kangxi has deep feelings for the queen. After the death of the queen, Emperor Kangxi was very sad. He decided to make Xianren, the queen's child, a prince, and personally assumed the responsibility of raising Xianren, an orphan, after the solemn mourning of the queen. On the third day of June in the 14th year of Kangxi, Emperor Kangxi conferred Yin Ren as the Crown Prince.

2. First scrapping:

On his way back to Beijing from his southern tour, Kangxi found the prince approaching his tent at night and peeping through the cracks. He immediately suspected that the prince might "rebel". This incident also stimulated him to make up his mind to abolish the Crown Prince immediately.

3, the second time is:

In the forty-eighth year of Kangxi, the contradiction between the big brother and the eight brothers intensified. In order to ease the situation, Emperor Kangxi decided to re-establish Yin Ren as Prince. On the 22nd of the first month, Kangxi re-established Yin Ren as the Crown Prince.

4. Second scrapping:

In April of the forty-ninth year of Kangxi, Shen Tiansheng, the minister of the Ministry of Foreign Affairs, colluded with Ilsay, the foreign minister of the Ministry of Foreign Affairs, to take over the additional silver case in the Hulan Heshuo case. The Crown Prince was planning to force his father to step down as soon as possible, and Kangxi was furious. The contradiction between the emperor and Chu Jun finally reached irreconcilable level. Kangxi decided to abolish the crown prince again.

Extended data:

After the abolition of Yin Ren, on the second day of February in the fifty-second year of Kangxi, Zhao Shenqiao, the left censor of Duchayuan, invited him to establish the Crown Prince, which was rejected by Emperor Kangxi. On the third day of May, the case of Yan Yinwa in Lama Town of Mongolia was concluded.

In November of the fifty-sixth year of Kangxi, Elvis Presley, a university student, and Chen Jiayou, an imperial envoy, wrote to Emperor Kangxi to build a reservoir. On the 20th day of the first month of the fifty-seventh year of Kangxi, imperial academy reviewed Zhu Tianbao's request and re-established Yin Ren as the Crown Prince.

On the second day of June in the fifty-ninth year of Kangxi, Emperor Kangxi conferred the title of Yin Rensan as the monarch and married Tumed Dahambel Alabadan. On the birthday of Emperor Kangxi, Elvis Presley once again proposed to Emperor Kangxi to re-establish Yin Wan as a prince, but it was not allowed.

On November 13th, 1961, Emperor Kangxi was critically ill and called three, four, seven, eight, nine, ten, twelve, thirteen princes and Longkeduo to see him. Emperor Kangxi made Yin Zhen the prince and Hongxi the prince, and asked Yin Zhen to be kind to the abandoned prince and the eldest son of the emperor.

Emperor Kangxi died in Changchun Garden that day; On 14th, Yin Zhen named Hongyan as the county king; On the 20th, Yin Zhen officially ascended the throne, and the following year was changed to the first year of Yongzheng. 1February 1 1 day, Yong Zhengdi made Hongyan the king of Dorothy county.