Zhengshi

Zhengshi (正始) was a Chinese era name used by several emperors of China. It may refer to:


 * Zhengshi (240–249), era name used by Cao Fang, emperor of Cao Wei
 * Zhengshi (407–409), era name used by Gao Yun (emperor)
 * Zhengshi (504–508), era name used by Emperor Xuanwu of Northern Wei