Dan Zhu was the son of Emperor . His mother was a concubine San Yi.
He was not very intelligent, and spent most his time playing a game called . Legend has it that when Emperor Yao wanted to replace Yihe Dan Zhu was recommended for the position but Emperor Yao disagreed, stating that Dan was not suitable at anything else other than Weiqi. In anticipation of Dan Zhu's anger, Yao exiled his son Dan Zhu to Yan , and appointed his son as his successor.