[New evidence of SUN Si-miao's date of death].

About the date of death of Sun Si-miao, there are hypotheses of "Yongchun" and "Yonghui". Some scholars even give a concrete date of "February 15th????? of the first year of Yongchun". Based on my own textual research of historical materials, the record in the Sun Si-miao's Biography of Biography in the Facts About the Popularization of the Garland Sutra (Avatamsaka Sutra) in China, written by Fazang is most believable, i.e., the "Pre-Yongchun hypothesis". Therefore, a more reasonable description of his death date should be "Sun Si-miao was died in about the second year of Tiaolu/the first year of Yonglong (680)", or "Sun Si-miao was died in 680 ± 1"