After the Khitans surrendered to Goguryeo, Jangsu sent gifts to both Northern Wei and Southern Qi, which took over the southern half of China after overthrowing Liu Song in 479. Both Qi and Wei tried to tighten Goguryeo's relationship with them. Wei emperors treated Goguryeo delegates as equal to Chinese delegates. Under the reign of Emperor Xiaowen alone, 41 emissaries were sent, but the frequency started to drop since Jangsu continued to keep hospitality with Qi. This decrease in exchanged delegates outraged Emperor Xiaowen, and at last he gave an order to capture Goguryeo delegates before they could reach the Qi capital. However, Jangsu paid no mind, and continued to send delegates to Qi. Northern Wei could not block Goguryeo, which indicated the success of Jangsu's diplomatic strategy: maximizing the situation and manipulating the power struggles between rival Chinese states to Goguryeo's advantage.