Guan Hanqing ; sobriquet Yǐzhāi (已齋), Yīzhāi (一齋), Yǐzhāisǒu (已齋叟); was a Chinese dramatist, playwright, and poet during the Yuan Dynasty. He has been described as among the most prolific and highly regarded dramatists of the Yuan period.

Dou E Yuan, commonly translated as The Injustice to Dou E, and also known as Snow in Midsummer, is a Chinese zaju play written by Guan Hanqing during the Yuan dynasty. The full Chinese title of the play is Gan Tian Dong Di Dou E Yuan, which roughly translates to The Injustice to Dou E that Touched Heaven and Earth.