Ling Zhen is put in charge of the making of cannons after the108 Stars of Destiny came together in what is called the Grand Assembly. In battles he would deploy and fire cannons when required. He participates in the campaigns against the Liao invaders and rebel forces in Song territory following amnesty from Emperor Huizong for Liangshan. In the campaign against Fang La, Ling Zhen is often called upon to bombard enemy cities to create chaos before attack commences.