Kang Xi's first son was Yin Xi.
Kang Xi's first son, Yin He, was stripped of his title and imprisoned for plotting against the Crown Prince. He died in the 12th year of Yongzheng.
The mother of Kangxi's first son was Consort Rong Ma Jia.
Kang Xi's first son was called Yin Rui.
Kangxi's first son was born when he was 13 years old.
Kangxi's first son was born to Consort Rong, Ma Jia.
The reason why Kangxi's first son, Yinreng, was not the crown prince was because Emperor Kangxi had made him the crown prince when Yinreng was still a baby and had given him all his love. Kangxi had deep feelings for Yinreng, so he did not choose any other son to be the crown prince. Therefore, Kangxi's first son, Yinreng, became the first crown prince of the Qing Dynasty.
Kang Xi hated his son the most. Yin Ni was the fifth son of Emperor Kangxi, the son of the " pig ". Emperor Kangxi imprisoned him for 26 years, and during this time, he gave birth to 20 children. Emperor Kangxi was very disgusted with Yin Ni and kept him in the harem like a pig.
The fate of Kang Xi's 17th son, Yin Li, was unknown.