It is likely that he was poisoned by trying to eat sulfur. His medical book records how he took sulfur himself. Many emperors throughout the ages died in the prime of life because of their superstitious belief in the alchemist's endosulfan medicine. Sulfur is indeed a poison. If you take it a few times, you will be poisoned. If you take it for a long time, it will cause heart attack, cerebral infarction, heat poison, blood stasis, and fiery poison. It is not advisable to use sulfur to dispel cold and dampness. Gold, stone and medicine are all very poisonous. Herbal medicines, plant medicines, animal medicines, and living medicines. Some of them have a very good effect in dispelling cold and dampness. Using living medicines to regulate the living human body is the right way. Why should we use highly toxic gold, stone, ore medicines. He took the poisonous stone medicine and recorded it in the book after taking it (the stone poison had not yet taken effect at that time). How many future generations of readers would be harmed by this! Mr. Li Ke, the master of Fuyang, said that medical practitioners should be careful when writing books. Once there is a mistake, it will cause endless harm.