Why do people in South Korea and North Korea have the same name system as China?

The name system of Korea and North Korea is the same as that of China, because Korea and North Korea were part of China in Shang and Zhou Dynasties, and also part of China cultural circle and Confucian cultural circle in history.

The Democratic People's Republic of Korea (Korean:, English: Democratic People's Republic of Korea, abbreviation: North Korea) is a socialist country located in the northern part of the Korean Peninsula in East Asia. The Workers' Party of Korea is the ruling party of the Democratic People's Republic of Korea. Between the DPRK and the ROK, it is bounded by the demilitarized zone between the DPRK and the ROK along the 38th parallel, bordering China and the Russian Federation in the north, the Yellow Sea in the west, the Shandong Peninsula across the sea, and the Sea of Japan in the east. Pyongyang, the capital. The Democratic People's Republic of Korea was founded on September 9th after the Second World War 1948, with a territory area of 122762 square kilometers and a population of 24.05 million (2008). Korea is a single nation and Korean is widely used. 1958, the Democratic People's Republic of Korea announced that it had completed the socialist transformation of urban and rural production relations and established a socialist economic system. 1970 announced the realization of socialist industrialization. 1975 became a full member of the "Group of 77" in May and formally joined the Non-Aligned Movement in August of the same year. 1991September 17 Join the United Nations with Korea. In July 2000, he joined the ASEAN Regional Forum. Established diplomatic relations with 163 countries (including the European Union). [ 1]? Korea is a socialist country, dominated by the subjective thoughts put forward by the first Kim Il Sung, ruled by the Workers' Party of Korea, and its political and economic system is dominated by the politics of the first army. North Korea pursues an "independent, peaceful and friendly" foreign policy and advocates the development of foreign relations in accordance with the principles of complete equality, independence, mutual respect, non-interference in each other's internal affairs and mutual benefit. Korea, the full name of the Republic of Korea (/Republic of Korea Greater Han Mingguo), referred to as Korea (? /Korea Hanguk), also known as South Korea and South Korea. Founded on August 1948 15, it is a republic located in the south of the Korean Peninsula in East Asia. Its name comes from three Korean tribes (Chen Han, Mahan and Han Ge) in the southern part of the ancient Korean peninsula, and its English name Korea comes from the ancient name "Korea". The capital is Seoul, with a population of more than 50 million, and the main ethnic group is Korean (Korean). South Korea is located in the south of the Korean Peninsula in Northeast Asia, surrounded by the sea on three sides, the Yellow Sea on the west, the Jiaodong Peninsula across the sea, the Korean Strait in the southeast, the Sea of Japan in the east, and North Korea across the demilitarized zone of the 38th parallel, accounting for 4/9 of the total area of the Korean Peninsula. South Korea was once a vassal state of the Central Plains dynasty in history. At the end of the Qing Dynasty, the Qing Dynasty was defeated in the Sino-Japanese War. South Korea broke away from the vassal relationship with the Central Plains Dynasty and later established the "Korean Empire". 19 10 was annexed by Japan and gained independence after World War II. 1950 The Korean War broke out and the north and south split. The northern country is called Korea, and the southern country is called Korea. South Korea is a member of G20 and OECD, a founding member of Asia-Pacific Economic Cooperation (APEC) and East Asia Summit, and one of the four little dragons in Asia. Since the 1960s, the Korean government has implemented the "export-oriented" economic development strategy, which has promoted the rapid development of the Korean economy and created the "miracle of the Hanjiang River" that attracted worldwide attention. It is a developed OECD country with a perfect market economy system. It is also the only developed country in the future 1 1 countries. South Korea's information technology industry has been ahead of the world for many years. In addition to high-speed Internet services, flat-panel display devices such as memory, liquid crystal display and plasma display screen and mobile phones are also in a leading position in the world market.