In the TV series "Yongzheng Dynasty", there is such a scene description, Hongshi hired a murderer to assassinate Hongli, and after the assassination attempt, he was discovered by Yongzheng, and Yongzheng gave death to Hongshi in order to prevent the tragedy of his own conquest from being staged again. This plot seems reasonable, but in fact, it is only the screenwriter's need for script creation. As the saying goes, tiger poison does not eat children, and the historical Hongshi was not directly killed by Yongzheng.
In real history, Hiroshi was very dissatisfied with Hiroshi's appointment as crown prince. Since ancient times, he has always been "standing up for a long time", and he has taken the matter of his father Yongzheng Emperor and his eighth uncle Yin Yu competing for the throne as his own reason. The Yongzheng Emperor had already kept silent about the struggle for the throne that year, but his own son repeatedly mentioned it, which deeply stung the heart of the Yongzheng Emperor, and in anger, he passed on the Hongshi to Yin Yu, who was the Prince of Lian at that time. Later, in order to consolidate his position and eliminate dissidents, the Yongzheng Emperor removed The Prince of Lian from the imperial family tree and put him under house arrest, and Hongshi, as the nominal "son", was naturally not spared. Not long after, Hiroshi died suddenly at the age of 24. It was not until the Qianlong Emperor succeeded to the throne that he called this half-brother "young and indulgent and acted imprudently" and re-wrote him into the imperial ancestral hall.
For the cause of Hongshi's death, there is no clear record in the history books, and the claim that Yongzheng killed his son is also people's speculation, and I personally feel that the father killing his son is not enough, because Yongzheng's adult sons are not many, and the relationship between Yongzheng and Hongshi when he first ascended the throne was still good.