Before the Song Dynasty, talents were concentrated in the north. After the Song Dynasty, the talents in the south exceeded those in the north. The reason?

Since the Five Husties in the Jin Dynasty, people from the north began to migrate southward on a small scale. During the Sui and Tang Dynasties, the economic center gradually moved southward, and commercial center cities such as Yangzhou appeared. By the Southern Song Dynasty, the economic center had completely moved to the south. . . . The south became a famous and prosperous place. During the Song Dynasty, wars continued in the north, and people moved south in large numbers. During the Southern Song Dynasty, the monarchs stayed in a corner and were not keen on regaining the lost land. Instead, they vigorously developed the economy. As a result, by the Southern Song Dynasty, the south had completely become the economic center, while the people in the north had become the economic center due to the war. A large number of people moved south, and the southern economy developed rapidly. A large number of talents gathered in the south and took root in the south. Therefore, after the Song Dynasty, the number of talents in the south exceeded that in the north.