Taejo of Goryeo
Choi Seungno was born in Gyeongju. He was the son of Silla noble Choi Eunham. Since the age of 12, he had been highly praised by Taejo of Goryeo. He spread Confucianism widely in Korea and set up the basic political structure of Goryeo at the era of Seongjong. According to his opinion, Seongjong accepted the ruling system of Later Zhou of China and threw away its traditional ruling system. Seongjong installed 12 provincial capitals and 3 small capitals which were Seoul, Gyeongju and Pyongyang.