The possibility is very small, because no matter how much Cixi dislikes Ci'an, Ci'an still has someone to take care of her. It is impossible for Cixi to cover the sky with one hand and not have the verdict reversed after so many years. In fact, the steps for Cixi to get the poison would be more cumbersome. The imperial physician might give her the poison, but this way there would be more insiders, and the secret might be exposed when other imperial physicians investigate the cause of Empress Dowager Ci'an's death, and other imperial physicians are not allowed to search. If so, it would also show that Cixi knew something inside, which could be exposed too easily.
It is really irrational to poison powerful people in the palace. Direct poisoning is rarely used in open and covert fights. Moreover, when to poison is also a question. If it is during the eating process If he falls down when he is hit, the nature of the murder will be highlighted, and history will not end the case as a result of illness. If the poison was administered in small amounts and multiple times, it would be difficult to control the time when Ci'an fell, and the hidden poison could still be easily uncovered. With Cixi's knowledge, she doesn't seem to be someone who would use multiple micro-poisons unless someone guides her, but then the chance of being exposed would be greater, and it would be difficult to poison her multiple times without being exposed once. Discover.
The Queen Mother’s food is relatively delicate, and may be presented separately. Only the Queen Mother eats it alone. Although there are many opportunities for poisoning from preparation to serving, there are many people involved. , with sharp eyes and loyal guards, so there is little chance of poisoning.
Even if the poisoning is successful, there must be a dedicated person responsible for checking the safety of the dishes before the Queen Mother eats them, and even tasting them. Such caution is common, and the Queen Mother does not know every dish. If you eat, you may not be able to pick out that poisonous dish. Moreover, there are few dishes that are repeated when served, and the taste of the Queen Mother is elusive.