Hyegun （1320-1376） A Korean monk from Yonghae 宁海. Also known as Naong 懒翁 （"lazy old man"） and Kang Wolhan 江月轩. He was a Son monk of Imje 临济 training who lived and taught at the end of the Koryo period. He was a student of the Indian master Shih-k'ung 指空 and the teacher of Muhak 无学. He lived at a time of increasing negative sentiment towards Buddhism due to its corruption. He is thought to have entered the sangha at the age of 20， after the death of a close friend. He spent a life of itinerant practice， and later in life became National Teacher 国师.