Jang Heunghyo (1564–1633) was one of the principal scholars of Neo-Confucianism in Korea in the early 17th century, active in the Gyeongbuk province. He was one of the main representatives of the second generation of scholars of the Toegye school. His life and the development of his philosophy are well-documented thanks to his lifelong practice of keeping a diary. References Jang Yunsu (장윤수), "Study on the Gyeong-Dang-Diary and Neo-Confucianism in the northern district of Kyeong-Buk in the 17th century" (2008) (scholar.dkyobobook.co.kr) See also Jang Hyeongwang List of Korean philosophers 1564 births 1633 deaths 16th-century Korean writers 17th-century Korean writers Korean Confucianists Neo-Confucian scholars People from Andong 17th-century Korean philosophers