Before attacking, however, he sent an envoy to Goguryeo's King Yuri, ordering him to send a royal hostage to Dongbuyeo. Goguryeo rejected the order leading to the first Goguryeo-Dongbuyeo war to occur in 6 AD.
To prepare for an assault, he sent a representative to Goguryeo's King Yuri, requesting that a royal hostage be sent to Dongbuyeo. However, Goguryeo refused this order, which led to the first confrontation between Goguryeo and Dongbuyeo in 6 AD.