As the fastest promoted queen in Qing Dynasty, why did Empress Ci 'an die suddenly and strangely?

Ci 'an is second only to Cixi in history of qing dynasty. She listened to politics with Cixi, started Tongzhi Zhongxing, and finally died strangely.

In the second year of Xianfeng, Empress Ci 'an entered the palace through the draft and became the concubine of Xianfeng. When he entered the palace, he was named a concubine, which shows that Emperor Xianfeng loved him. However, before May and January, she was made your wife by Xianfeng. In June, she planned to be made a queen, and in October, she was officially made a queen. In just six months, Ci 'an was promoted to the fourth grade and became the most distinguished woman in the Qing Dynasty. After the death of Emperor Xianfeng, Ci 'an unified Cixi and Yi? He launched a coup in A Xin, seized power, listened to politics, formally mastered the supreme sovereignty of the Qing Dynasty, and became the center of the dynasty, even inferior to Empress Dowager Cixi.

In TV series, the image of Ci 'an is often honest, cowardly and incompetent. Actually, it is not. Empress Cian has great political talent. According to the "Legacy of Qing Palace", the East Palace is superior to Germany, and the measures of big punishment and big reward are the main ones; What are the advantages and disadvantages of reading the letter and calling for timely consultation and visit? It can be seen that although Empress Ci 'an is not keen on politics, all she asks is the important affairs of the imperial court, and Cixi is just a trivial matter. As the empress dowager, Ci 'an is deeply respected and admired by ministers.

Moreover, Cian is very principled, and it will be there if you don't shoot. At first, it was amazing. An Dehai, the eunuch of Cixi, used Cixi's favor to do evil and was unscrupulous. The North Korean minister was miserable and was blackmailed by him. Finally, Ci 'an ordered him to be executed. On the issue of establishing Tongzhi emperor, Ci 'an is equally unambiguous. Cian took a fancy to Arut, the gentle and virtuous daughter of Chongqi, and Cixi took a fancy to Fu Cha Stone, Feng Xiu's youngest daughter. Finally,

1880, Cian died suddenly, but the cause of death is a mystery. On the morning of Ci 'an's death, Ci 'an was still dealing with political affairs and suddenly died. Legend has it that Ci 'an was poisoned by Cixi, but although there was a little friction between Ci 'an and Cixi, there was no big feud. Cixi does not need to take this risk. According to the prescription analysis of Empress Ci 'an recorded in Weng Tonghe's Diary, experts later thought that Ci 'an should have died of cardiovascular and cerebrovascular diseases, and scholars also found symptoms consistent with this view in the cases recorded in Qing History. After Ci 'an's death, Cixi was very calm. In order to arrange Ci 'an's funeral, she never hesitated. At the same time, she called all the ministers and allowed them to pay tribute to Ci 'an's remains. It can be seen that Cixi was very calm at that time and didn't hide anything, so Ci 'an should probably have died of cardiovascular and cerebrovascular diseases.