Dahui Zonggao (1089–1163) (Chinese: 大慧宗杲; Wade–Giles: Ta-hui Tsung-kao; Japanese: Daie Sōkō; Vietnamese: Đại Huệ Tông Cảo) was a 12th-century Chinese Chan (Zen) master. Dahui was a student of Yuanwu Keqin (Wade–Giles: Yuan-wu K'o-ch'in; Japanese: Engo Kokugon) (1063–1135) and was the 12th generation of the Linji school of Chan Buddhism. He was the dominant figure of the Linji school during the Song dynasty. Dahui introduced the practice of kan huatou, or "inspecting the critical phrase," of a kōan story. This method was called the "Chan of gongan (kōan) introspection" (Kanhua Chan).