War-torn nations forge lasting peace through diplomatic relations.
The article discusses the contact between Northern Wei Dynasty and Koguryo before and after a war. In 435, ambassadors were sent between the two kingdoms, but war disrupted their communication. After the war, Koguryo accepted an exiled king from a defeated kingdom, causing tension with Northern Wei. When the exiled king was killed, the relationship improved, leading to friendly relations until the end of Northern Wei Dynasty.