The Hongzhou school was a Chinese school of Chán of the Tang period (618–907), which started with Mazu Daoyi (709–788) and included key figures like Baizhang Huaihai (749–814), Dazhu Huihai, and Huangbo Xiyun.
Youmin Temple in Nanchang, Mazu's main Hongzhou monastery during his later life (which at the time was known as Kaiyuan monastery).
Doui, a student of Zhizang and Baizhang who established the Gaji san school (迦智山) at Borimsa.