Although Koryo has been stationed by Mongols, it is still in a state of frequent rebellion. The South Korean court has retreated to Jianghua Island, far away from Seoul, and directed resistance on the island. However, in 1258, Emperor Gaozong [Wang Zhuan] sent Prince Wang Dian as a hostage to the Mongolian court. After Kublai Khan succeeded to the throne, he sent the young prince back to China to rule Korea and made him a son-in-law. From then on, the Koryo dynasty became a submissive vassal and fought Haidu through this marriage with the royal family of the Yuan Dynasty.
Mongolian-Chinese policy
Kublai Khan pursued a dual policy, and his orientation depended on whether people regarded Kublai Khan as (or considered him as) the successor of Genghis Khan, or regarded him as the successor and son of heaven of China 19 dynasties. From the Mongolian point of view, he has always maintained the spiritual unity of Genghis Khan Empire in principle, if not in reality. As the heir of the Supreme Khan, Genghis Khan and Mongo, he insisted on the obedience of Genghis Khan's fiefs, and each fief became an autonomous khanate. In order to force the Wokuotai family and the Chahetai family to make such submission, he spent his whole life in the Mongolian War. Persia is only a province of his empire to him, ruled by his younger brother Xu Liewu. Persian Khan in his eyes-Xu Liewu (1256- 1265 in office), Abaqa (1265- 128 1 in office), argon (1284-). Kublai Khan, who owns all of China, is in principle the suzerain of Turkistan, Mongolia and Russia, and also the de facto suzerain of Iran. Indeed, as Kyle Poirot said, he is a real "great monarch" and "the most powerful monarch in the world who has ruled people, land and wealth since Adam's time". When Kublai Khan became the successor of Genghis Khan in other parts of Asia, in China, he tried to be the faithful successor of the 19 dynasty. No son of heaven plays his role as seriously as he does. The government he restored healed the wounds of a century-long war. After the demise of the Song Dynasty, he not only retained the institutions of the Song Dynasty and all the administrative officials, but also made every effort to win the personal loyalty of the officials at that time. After conquering the land, he also conquered people's minds. Perhaps the greatest fame he wants is not "he was the first person to conquer all China in the world", but "the first person to govern China". The traffic problem is so important to the administration and material supply of this huge empire that he has always been very concerned. He built a royal road, planted trees on both sides of possible roads to shade the sun, and built a business travel inn every once in a while. More than 200,000 horses were distributed to various post stations for Imperial Post. In order to ensure Beijing's food supply, he restored and opened the Grand Canal, through which rice was transported from central China to the capital. In order to guard against famine, he resumed the national grain control policy, which was formulated long ago by China and perfected by the famous Wang Anshi in the Northern Song Dynasty. When the years are good, the state buys surplus grain and stores it in the state warehouse. When food prices rise in famine years, open warehouses and distribute food free of charge. Public relief was also organized. Law 1260 requires local governors to provide relief to old scholars, orphans and patients. Another law in 127 1 requires the construction of hospitals. These measures are influenced by both China's administrative tradition and Kublai Khan's Buddhism, which is obviously very strong. Rice and corn are regularly distributed to poor families. Kyle Poirot said that Kublai Khan himself helped 30,000 poor people every day. The only deficiency of Kublai Khan's administration is finance. In various systems of the Song Dynasty, Kublai Khan discovered "paper money", or the use of paper money. He introduced paper money into circulation and made it the basis of finance. 1264, he issued a decree announcing the use of paper money to calculate the value of major commodities. His first "finance minister" was Saeed Acer (died in 1279), a Muslim who didn't spend money. He seems to control the issuance of paper money within a reasonable range. Successive ministers began to act rashly. First, Ahema in the river (who died in 1282), a Finnakte (southwest of Tashkent, the former Soviet Union), and then Sanger in Uighur, implemented an unrestricted inflation policy and devalued paper money. When collecting money, they used the method of exchanging coins many times and established the method of usury monopoly. Ahema was assassinated in 1282 and was condemned by Kublai Khan after his death. Sanger was executed for corruption (129). After Kublai Khan's rule, in order to prevent the original banknotes from falling, it was necessary to issue new banknotes (1303), and this time it was the turn of the new banknotes to depreciate.