fact that Korean kings were the Khans' son-in-law with Mongolian princesses as their queens. The Korean kings during times of Yuan influence also had the authority to attend the Kuriltai of the Mongol Empire as titled rulers of Korea and Shenyang (Korean: 고려심왕, Hanja: 高麗瀋王). Even revered darugachis from the Yuan Dynasty could not act carelessly in front of Goryeo kings having to bow in front of them and receive a drink to pay their respects. King Chungseon during his reign made attempts to make reforms by reestablishing monitoring institutions such as the Censorate of Household and Land Inspection (Korean: 전민변정도감, Hanja: 田民辨整都監) that focuses on confiscating illegal properties under corrupt nobles whilst at the same time promoting the development of Confucianism studies inside the nation. Confucian shrines known as Munmyo (Korean: 문묘, Hanja: 文廟) that pays homage to Gongzi were built in Korea under his reign. Confucianist educational centers such as the Sunkyungam, the predecessor of Sungkyunkwan, were also founded with scholarship foundations proposed by the renowned confucian scholar An Hyang. Mongol Invasions of Japan (1274~1281) When Kublai Khan decided to execute the plan of invading the Kamakura Shogunate of Japan after having their emissaries deliberately ignored or killed by the Japanese, the role of constructing the enormous fleets (along with sending troops) for transport were befallen upon the Koreans of Goryeo. It was a huge expense, but Chungnyeol nor the Goryeo government could oppose the Khan's 'subsequent request' which was rather enforced albeit their opposition. Goryeo eventually suffered great economically due to preparations for the expedition to Japan, and the livelihoods of the people were devastated by the requisition of war supplies. Horse farms set up to raise war horses for the expedition amounted in Jeju Island during these times. It was King Chungnyeol that selected the famed Kim Bang-gyeong (Korean: 김방경, Hanja: 金方慶), a descendant of both Goryeo and Silla royalty, that stood out in the campaign as one of the few competent generals of the Mongol-led expedition, minimizing Korean losses and inflicted significant damage on the Japanese defenders. Kadaan's Invasion of Korea (1290~1291) In 1290, Kadaan (Korean: 카다안, Hanja: 哈丹), a former Mongolian general and rebel of the Yuan Dynasty stationed in Manchuria, invaded Goryeo after his defeat against the Yuan forces led by Naimandai (Korean: 내만대, Hanja: 乃蠻帶). Despite dire situations regarding Kadaan's rebels advancing further into Goryeo territory and the local troops' inability to