Huyan Zhuo's name was brought up when the
Song imperial court discussed how to quell the outlaws of
Liangshan Marsh after they defeated and killed Gao Lian, the prefect of
Gaotangzhou. Grand Marshal
Gao Qiu, who was the uncle of Gao Lian, recommended Huyan to Emperor Huizong, saying he is the man for the job. Huyan is summoned from his military post at Running Commandery (present-day
Runan County,
Henan) to the imperial capital Dongjing (; present-day
Kaifeng, Henan). The emperor appoints him the chief commander of the mission, with
Han Tao and
Peng Qi as his lieutenants. He also received a black brawny stallion from the emperor. In his first encounter with Liangshan, Huyan Zhuo lost Peng Qi, who was captured by
Hu Sanniang and won over by
Song Jiang. Huyan then sent out his special cavalry consisting of groups of armour-clad horses linked by iron chains. The combined might of the horses charging forward overwhelms the force of Liangshan.
Song Jiang and his men holed themselves up, protected by the marsh, to work out how to beat the cavalry. Meanwhile, Huyan requested the court to send
Ling Zhen, an artillery officer and cannon maker, over to shell Liangshan. Ling's cannons hit the far shores of the marsh, striking fear among the outlaws. Liangshan then sent some of its best swimmers to lure Ling into the marsh and seized him. Ling too joins Liangshan, having succumbed to Song Jiang's warm treatment.
Tang Long suggested to Song Jiang that his cousin
Xu Ning, a
infantry lance instructor in Dongjing, could annihilate Huyan's cavalry. After
Shi Qian stole an impenetrable armour of Xu, a precious ancestral heirloom, Tang tricked the instructor to pursue the elusive thief until he came to the vicinity of Liangshan and was drugged. Finding himself trapped, Xu also became a chieftain. He trained some of Liangshan's foot soldiers (infantry) in the use of the hooked lance. The weapon toppled Huyan's cavalry, causing his army to collapse. Han Tao also defected after being captured. ==Battle of Qingzhou==