Last China Empress went crazy in the end? | Wanrong

Wanrong, the Last Empress of China, was born as a pampered and beautiful girl. But after she became the Empress, her destiny was closely tied to Emperor Puyi. They had lived luxuriously in the Forbidden City. After the royal family was exiled, they continued to stay together in Tianjian and Manchuria. However, in the end, why was Wanrong abandoned?