Early Koreans started out as nomadic people, but later they developed clans. Being attached to China, China had a heavy influence on Korea, and during the Han dynasty part of Korea was conquered by China. While conquered the Koreans adopted Confucianism. Later they were conquered by the Silla, and by 670 the Silla conquered all of Korea. Despite overthrowing the Chinese in Korea the Silla payed tribute to China to reduce the likelihood of an attack.