Hao Siwen's mother dreamt that the celestial "Wood Dog of Well" is going to be reincarnated into the human world. She became pregnant shortly after that and gave birth to Hao Siwen. Hao Siwen is nicknamed after the celestial creature because he is believed to be its human incarnation. Hao Siwen is one of the leaders of the Liangshan cavalry. At last, he is beheaded and dismembered by the enemy general Fang Tianding during the campaign against Fang La.