Chang San-feng (張三豐 pinyin zhang1 san1 feng1) is a semi-mythical Taoist master dating from either the late Sung dynasty or the Yuan dynasty.
Much of the written material about him is mythical, contradictory, or otherwise suspect. For instance, he is reported to have been born in 960ad, 1247ad, and again in 1279ad. He is described as being seven feet tall, with the bones of a crane and the posture of a pine tree, having whiskers shaped like a spear, and being able to cover 1000 Li in a day.
Legend reports Chang San-feng as having originated the concepts of Nei chia or soft internal martial arts, specifically Tai Chi Chuan.
More reputable sources record two chinese emperors sending missions to Chang San-feng to ask for his advice, although neither mission is reported to have found him.