Kang Xi's first son was Yin Xi.
Kangxi's first son was born when he was 13 years old.
Kang Xi's first son was called Yin Rui.
The mother of Kangxi's first son was Consort Rong Ma Jia.
Kangxi's first son was born to Consort Rong, Ma Jia.
Kangxi's first child was Aisin Gioro Chengrui, who was born in September of the sixth year of Kangxi (August 8, 1667). Unfortunately, the child died at the age of three.
Emperor Kangxi's son, Yin Zhen, inherited the throne and became Emperor Yongzheng.
Emperor Kangxi had a total of 35 sons, the 17th of whom was Aisin Gioro Yinli. He was born in the 36th year of Kangxi (1697) and died in the 3rd year of Qianlong (1738) at the age of 42. He was once granted the title of King Guo and was in charge of the affairs of the Fan Yuan. He was appointed to assist Emperor Yongzheng on his deathbed. After Qianlong ascended the throne, he served as the prime minister and the chief of the Ministry of Punishment. Because Yin Li had no son, he took the sixth son of Emperor Yongzheng as his stepson.
Kangxi's eleventh son was Yinbi, who died in the thirty-fifth year of Kangxi at the age of twelve. As for why he did not appear, the search results did not provide a clear answer. Therefore, I don't know why Kang Xi's eleventh son didn't appear.