Wei Zi was killed by too many doctors.
1- Hui Guifei has a poor foundation
Hui Guifei's family is rich, but my health is really poor. Moreover, she has a bad personality and offended many people by virtue of her noble birth, but she didn't know it.
2- The Queen can't tolerate Hui Guifei
The main reason why the queen can't control Hui Guifei is that Hui Guifei married the emperor almost at the same time as her, and her family has climbed the peak many times. The queen is afraid that Hui Guifei's son is bigger than her husband.
3- The Queen Mother bears a grudge against the Gaos.
Empress Dowager Cixi and Gaos thought that the daughter of Empress Dowager Cixi would marry in Mongolia, so that Empress Dowager Cixi would never see her daughter again. Therefore, Empress Dowager Cixi hated Gaos. So when Hui Guifei just married the emperor, the queen mother ordered Qi Taifu to take medicine for Hui Guifei, making Hui Guifei sterile for life. After Gao Xi's death, Empress Dowager Cixi was right to mention Dr. Qi. Everyone knows that Hui Guifei died because Dr. Qi drugged her. Seeing this, everyone knows that Dr. Qi belongs to the Queen Mother. But Dr. Qi also served the emperor, which can be seen from the fact that Dr. Qi gave Huan an "abortion medicine" for contraception.
4- Qi Taiyi dared not speak out when he was suffering.
Although the emperor paid special attention to the children, Hui Guifei was always in poor health, and the emperor ordered Qi Taiyi to make a diagnosis and treatment. At the same time, the queen also drugged Hui Guifei, and the queen mother also drugged Hui Guifei. The three parties put pressure on Qi Taiyi at the same time, and Qi Taiyi really didn't dare to make any noise. In fact, Qi Cure too much can be said to be the queen mother's person or the emperor's person, because he is loyal to both of them. But Dr. Qi is the most loyal to the emperor, because the emperor has the most power, but he can't afford to offend the queen mother, so he will be loyal to the queen mother.