Dan Tianfang Lv Siniang assassinated Yongzheng.

Lv Siniang's assassination of Yongzheng is only recorded in unofficial history and folklore. According to official records, Yongzheng died suddenly from overwork. But many people think this is an excuse, and the real cause of death of Yongzheng has different opinions, leaving a mystery. There are folk legends about Lv Siniang's assassination and Cao Xueqin's lover's murder, but this is not enough. Yongzheng died after taking toxic Dan medicine (possibly containing mercury) due to illness. Brief introduction of Lv Siniang: Lv Siniang, a native of Qing Dynasty. As the granddaughter of Lv Liuliang (daughter), unofficial history recorded that he murdered his ancestors in the form of literary inquisition (killing his father) in retaliation for Yongzheng, and sneaked into the palace in the name of choosing a concubine. Later, Yongzheng called him to sleep, and he beheaded Yongzheng with a dagger and died. Attached is a brief introduction of Lv Liuliang: Lv Liuliang (1629-1683), a native of Tongxiang, Zhejiang, is a thinker and physician. Participated in anti-Qing activities, practiced medicine in seclusion after defeat, and selected articles on current affairs. He is the author of Poems of Dongzhuang and Collected Works of Mr. Late Village. Lv Liuliang has always opposed the Manchu Dynasty. His article said, "Although the breeze is fine and difficult to blow me, why doesn't the bright moon shine on people?" His disciples, Ceng Jing and others worshipped his theory and spread it widely. After that, Ceng Jing was sent to prison, and Lv Liuliang was also cut open, slaughtered and his works were burned.