Hao Siwen was the sworn brother of Guan Sheng. Once, his mother had a dream that the celestial *Jing-Mu-An was coming into the human realm, and she became pregnant after that, giving birth to Hao Siwen. Thus, Hao Siwen earned the nickname 'Jing-Mu-An' (井木犴). Hao Siwen excelled in martial arts, and served as Guan Sheng's subordinate.