North Korea
Japan tried to suppress Korean traditions and culture and ran the economy primarily for its own benefit. Korean resistance groups known as Dongnipgun (Liberation Army) operated along the Sino-Korean border, fighting guerrilla warfare against Japanese forces. Some of them took part in allied action in China and parts of South East Asia. One of the guerrilla leaders was the communist Kim Il-sung, who later became the first leader of North Korea.
2018 North Korea–United States summit
North Korea's supreme leader Kim was in Beijing on March 25–28, 2018, arriving by special train for talks with China's paramount leader Xi Jinping, Kim's first known out-of-country excursion since taking power six years previously. China stated that North Korea was "committed to denuclearization" and willing to hold a summit with the United States. It was organized by the invitation of Xi. During the meeting between two leaders, Kim officially invited Xi to the North Korean capital Pyongyang when it was convenient in his schedule, and Xi accepted the invitation.
Xi urged Kim to strengthen the strategic and diplomatic future partnership between China and North Korea. Kim stressed to Xi that North Korea and China are communist countries and that there are many ways to cooperate in various aspects in the future. Kim and Xi met again on May 7, 2018, in the city of Dalian, China.