According to historical records, Emperor Kangxi went to the hunting ground in the suburbs of Beijing to hunt. He felt uncomfortable and returned to the palace. Two days later, the imperial edict said that I had a little cold and needed a rest, so I wouldn't play first. Judging from the imperial edict, Kangxi refused to admit that he was seriously ill, but apparently because of his physical condition, he could not persist, so he had to make such an imperial edict and stop working.
Unexpectedly, Kangxi died suddenly on the seventh day after catching a cold. Later, during the Yongzheng period, there was a book called The Lost Sense of Justice, which mentioned the death of Kangxi, saying that Yongzheng gave Kangxi a bowl of ginseng chicken soup, and then Kangxi died and Yongzheng became the emperor. According to the book, it is obvious that Yongzheng poisoned Kangxi. At that time, Yongzheng retorted that it was framed in May, which was not true, but Kangxi did drink the ginseng chicken soup given by Yongzheng before his death. No one knows whether it is poisonous or not.
In fact, although Yongzheng was very strict, he was not a cruel man. On the contrary, he is still a soft-hearted person. Even Kangxi commented on Yongzheng's noble character and should not have killed his father. Kangxi was really sick at that time. He is nearly 70 years old. At that time, he may die of a cold. In his later years, Kangxi and Yongzheng had joined hands with Longkeduo, which was very beneficial to Yongzheng in Beijing and did not need to kill his father. So Kangxi's death should be an act of god, not man-made.