Viceroy of Zhili
Sui is a matrilineal descendant of the prominent Fang clan of Tongcheng, Anhui, notable for its many scholars and philosophers. She is an 18th generation descendant of Fang Bao, an influential Chinese poet who founded the Tongcheng School of literary prose popular throughout the Qing Empire. Notable ancestors also include Fang Gongcheng, tutor of the imperial palace, and Fang Guancheng, Viceroy of Zhili seated at Tianjin from 1749 to 1768 amongst other Qing era scholars.