Wei Zheng, courtesy name Xuancheng, posthumously known as Duke Wenzhen of Zheng, was a Chinese politician and historian. He served as a chancellor of the Tang dynasty for about 13 years during the reign of Emperor Taizong. He was also the lead editor of the official history of the Sui dynasty, the Book of Sui, which was composed in 636.

Emperor Taizong of Tang, previously Prince of Qin, personal name Li Shimin, was the second emperor of the Tang dynasty of China, ruling from 626 to 649. He is traditionally regarded as a co-founder of the dynasty for his role in encouraging his father Li Yuan to rebel against the Sui dynasty at Jinyang in 617. Taizong subsequently played a pivotal role in defeating several of the dynasty's most dangerous opponents and solidifying its rule over China proper.