Liu Zhenghui (Chinese: 刘政会) was a minister and general during the early Tang Dynasty. A descendant of Liu Qubei, a Xiongnu prince during the Han Dynasty, Liu Zhenghui was born in Huazhou and served as a vice officer (Sima) in the Yingyang Fu (regional military office) of Taiyuan during the Sui Dynasty. His grandfather Liu Huanjuan was a chancellor during the Northern Qi dynasty. His father Liu Tan was the chief official of the Court of Judicature and Revision during the Sui Dynasty. When Li Yuan rebelled against Sui in 617, Liu Zhenghui joined Li Yuan's rebel army. His first contribution to the establishment of the Tang Dynasty was to help Li Yuan and Li Shimin execute Wang Wei and Gao Junya, two of Li Yuan's assistants sent by Emperor Yang of Sui as spies. During the early years of the Ta