Yang Zhengdao (Chinese: 楊政道, c. 618 – early 650s) or Yang Min[1] (Chinese: 楊愍) was a Chinese figurehead installed by the Eastern Turkic Khaganate during the bloody Sui–Tang transition. He was a grandson of Emperor Yang of Sui, and "ruled" as King of Sui (Chinese: 隋王) in an area around Dingxiang Commandery from 620 — when he was still a baby — to 630, the year he surrendered to the Tang Empire. His state is sometimes known in history as the Later Sui (Chinese: 後隋; pinyin: Hòu Suí).
His father Yang Jian and grandfather Emperor Yang were both killed in a coup before he was born.[2]