Aixinjueluo Hongteng is the descendant of which son of Kangxi?

There is no such person!

The generation of Hong in the Aixinjueluo genealogy is as follows:

Yinti’s fifteen sons: Hongyu, Hongfang, Hongwei, Hongyao, Honghan, Hongshao, Hongshang, Hongtong, Hongming, and Hongtun (the fifth, eighth, ninth, tenth, and eleventh sons died early and are not named)

Yinreng’s twelve sons: Hongxi, Hongjin, and Hongyan , Hongchao, Hongyao, Hongwei, Hongbing, and Hongwan (the eldest son, fourth son, fifth son, and eighth son died early and are not named)

Yinzhi’s twelve sons: Hongqing, Hongsheng, and Hongxi . Hongyun, Hongshi, Hongli, Hongzhou, Fuyi, Fuhui, Fupei, Hongluo

Yinqi’s seven sons: Hongsheng, Hongzhi, Hongang, Hongsheng, Hongtong (among them The third and fifth sons died early and are not named)

Yinyou’s seven sons: Hongshu, Hongzhuo, Hongxin, Hongjing, and Hongtai (the third and fifth sons died early and are not named)

Yinsu's first son: Hongwang

Yinsu's eight sons: Hongzheng, Hongfu, Hongxiang, Hongkuang, Hongding, Dongxi, Sibao and Duxixin

Yinxuanwo’s six sons: Hongxu, Hongxuan, and Hongcan (the eldest, third, and fourth sons died early and are not named)

Yinxu’s six sons: Hongshi, Hongkun (the eldest, third, and second sons died early) The son, fourth son, and sixth son died early and are not named)

Yinxiang’s ten sons: Hongchang, Hongdun, Hongzhen, Hongxiong, Honglan, Hongxiao, Shouen, Amuhulang (among them The second son died early and is unknown)

The four sons of Yinzhen: Hongchun, Hongming, Hongying, and Hongxuan

The five sons of Yinzhen: Hongqing, Hongfu, and Hongshou ( Among them, the eldest son and the second son died early and are not named)

Yinlu’s ten sons: Hongpu, Honghao, Hongzhen, Hongming, Hongrong, Hongwen, and Hongchen (including the eldest son, the third son, and the seventh son

Yinli's first son: Zao's death, no name

Yinyi's second son: Hongsheng, Hongrun

Yinxi's second son: Hongzhu, Hongxun

Yinhu’s five sons: Hongzhu, Ruibao, Hongsong, and Hongfeng (the second son died early and is not named)

Yinqi’s seven sons: Hongzhao, Honglan, Hongliang, Hongchun, Hongqian, Hongpei, Hongshan

Yinchenbi’s four sons: Hongchang, Hongao, Hongkang, Hongchao