Under Wanyan Wuyashu's order, Shi Shihuan (石適歡) led Jurchen army under the invitation of anti-Goryeo Jurchens in Helandian (present-day southeastern Hamgyong) to defeat pro-Goryeo Jurchens in the area. After subduing Jurchens in Helandian, the Jurchen army advanced southward to chase about 1,800 remnants who defected to Goryeo. Goryeo did not hand them over but sent Im Gan (林幹) to intercept the Wanyan army. However, Shi Shihuan defeated Im Gan north of the Chŏngp'yŏng wall and invaded the northeastern frontier of Goryeo. Goryeo dispatched Yoon Gwan (尹瓘) but lost a battle again. As a result, Wuyashu subjugated the Jurchen in Helandian.