The predecessor of the Korean Kingdom was the Koryo Dynasty. After 1392 overthrew the Wang regime, Zhu Yuanzhang named it "Korea". Korean Peninsula, called Korean Peninsula by South Korea, is a peninsula in Northeast Asia, surrounded by the sea on three sides.

The Korean Peninsula is connected with Russia in the northeast, China in the northwest through Yalu River and Tumen River, and Japan in the southeast through the Korean Strait. The west, south and east are respectively surrounded by the Yellow Sea, the Korean Strait and the Sea of Japan.

Historical evolution of Korea

In the 7th century A.D., Silla unified the south of the Datong River on the Korean Peninsula with the help of the Tang Dynasty, which is called "the era of unified Silla" in history. In 904, a monk named Gong Jin in Silla established Taifeng. In 9 18, Wang Jian, a post-Koguryo general, overthrew the rule of the Gong clan and changed his name to "Korea" because of his misconduct and abuse of power.

The Koryo dynasty was a country with Buddhism as its state religion. North Korea maintained a history of nearly 500 years on the Korean peninsula until 1392, when North Korean general Li Chenggui established the "Korean Dynasty".