What was Wang Kon's greatest achievement?

1. conquering Korea for China

2. unifying Korea under the Koryu dynasty

3. creating a system of moveable type

4. promoting the ideals of Shintoism

Wang Kon was a decorated leader of Korea in 918 who founded Koryŏ dynasty at Songdo. During his term, on 936, he established a unified kingdom on the Korean peninsula. His technique was the absorption of refugees to his state, even the survivors and the overthrowns.