Complex sentence: Guan Hanqing (fl.14th century CE), sobriquet "the Oldman of the Studio" (齋叟 Zhāisǒu), was born in the capital city of the Yuan Dynasty, Dadu and produced about 65 plays, mostly in Vernacular Chinese of the time.
Split into simpler sentences: Guan Hanqing (fl.14th century CE), sobriquet "the Oldman of the Studio" (齋叟 Zhāisǒu), was a Chinese playwright in Yuan Dynasty. Yuan was born in the capital city of the Yuan Dynasty, Dadu and produced about 65 plays, mostly in Vernacular Chinese of the time.