Ren Zong, Chinese emperor (died 1063)

Emperor Renzong of Song, personal name Zhao Zhen, was the fourth emperor of the Northern Song dynasty of China. He reigned for about 41 years from 1022 to his death in 1063, making him the longest reigning Song dynasty emperor. He was the sixth son of his predecessor, Emperor Zhenzong, and was succeeded by his cousin's son, Zhao Shu who took the throne as Emperor Yingzong because his own sons died prematurely.