From A.D. 123 1, the troops of the Yuan Dynasty marched eastward to Korea (now the Korean Peninsula) for nearly forty years. Although he defeated the Korean army many times, he never made the Korean soldiers and civilians succumb to defeat. At that time, korean king's name was Wang Min, and he was Wang Bin's father. In order to get peace in North Korea, he adopted the method of negotiation with the Yuan Dynasty. In A.D. 127 1 year 1 month, Wang Min sent Jin Lian, an envoy of the Tang Dynasty, to propose to Kublai Khan, but the result was not allowed. In June of the same year, Wang Min sent his son Wang Min as a hostage and proposed to Kublai Khan to exchange Wang Min in Yuan Shizu. Seeing that King Koryo sent his sons to the Yuan Dynasty, Wang Mo's sincerity touched Kublai Khan and immediately agreed to Wang Mo's proposal. Kublai Khan intends to betroth South Korean Prince anping princess to Wang Yun.
Anping princess Hu Du Li Shi is Kublai Khan's eldest daughter, and her mother is the empress of the Yuan Dynasty. This is a princess who has been spoiled since childhood. She is very arrogant and willful, really like a wild horse on the grassland. The princess is even more reluctant to marry the small country of North Korea, but her father Kublai Khan's letters have been issued and cannot be changed. She can only submit to humiliation. She is still young, only fifteen years old. She grew up in the palace, having no opinion or doctrine, and she could only obey her father's orders.
1274 1 1 month, Wang Yun, who was then in korean king, entered the imperial city with anping princess who arrived at the National Assembly Temple. After they got married, anping princess still lost his temper at home, even more willful, which often embarrassed Wang Yun and ministers. Although Wang Yun, a korean king, was often angry with the princess of the Yuan Dynasty, Kublai Khan was very satisfied with the princess-level queen, thus maintaining the national stability of North Korea and continuously developing its economy. It can be said that the loss is greater than the honor.
After anping princess's sudden death in May 1297, Wang Yun was worried that Kublai Khan would believe the rumor and turn against him, fearing that the Yuan Dynasty would invade Korea again. So Wang Yun frankly asked the Yuan Dynasty to abdicate and passed it on to Wang Yun, the son born to anping princess, who was Kublai Khan's grandson. The result was peace and prosperity in North Korea, and Wang Yun had to enjoy his old age. This is the reason why he decided to abdicate.