Are Koreans Koreans?

After the concept of "Korean nation" was put into practice, Koreans entered China on a large scale in the late Ming and early Qing dynasties, but the number was small. /kloc-At the beginning of the 0/9th century, the Korean peninsula was invaded by Japan, and some Koreans began to emigrate to the northeast, reaching170,000 in the middle of the 9th century, partly because of hunger and partly because of the anti-Japanese struggle. Starting from 1945, some Koreans began to move back to the Korean peninsula, and the rest stayed in the northeast. 1949, the Korean name of China was officially born. Celebrities who stayed in China can learn from "Zheng Lvcheng" and "Golden Flame". The official language of Korean in China is Xianjingdao dialect, which was decided by Premier Zhou in the early days of the founding of the People's Republic of China. Most Korean people in Liaoning Province use Ping 'an dialect, while some Korean people in Heilongjiang Province and Jilin Province use Gyeongsang dialect and Jeolla dialect except Yanbian area. I've also heard that some Koreans in Jilin use the central dialect, which is Seoul dialect. North Korea and South Korea were split into two countries because of the 1950 war. After the victory of World War II, the United States and the Soviet Union supported Li Chengwan and Kim Il Sung respectively, facing each other across the mountain. Interestingly, in gangwon, the holiday villas of Li Chengwan and Kim Il Sung are less than 1 km apart. On June 25th, the Korean War broke out, which lasted for three years and finally ended on the 38th parallel. Before and less than four months after the start of the war, two people, Jin Jiu and Cao Xizhi, died. Their deaths had a far-reaching impact on the Korean War. Mandarin used by the Korean government is an improved version of Gyeonggi-do dialect, commonly known as "Seoul dialect". There are gangwon dialect, Chungcheongnam-do dialect, Jeolla-do dialect, Gyeongsang-do dialect and Jeju Island dialect, which is the most unique dialect in Korea. The Mandarin of the North Korean government is "Pyongyang Dialect", which is an improved version of Pingan Road Dialect. In addition, there are Jing Xian dialect, as well as the Central Dialect, Central Dialect and Jing Xian Dialect which are very close to Gyeonggi Province dialect. The writing style used in North Korea is close to that of Chinese Korean, while in South Korea, after vocabulary reform at the end of last century, foreign words were added and the writing format was simplified, which made Korean, Korean and Chinese Korean have different writing formats.