The Korean crisis is a watershed event in American-Chinese relations

1The two nuclear-armed countries are

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pointing at each other their most lethal strategic weapons while trying to resolve the legacy of an inconclusive war they fought, with the help of their allies, on behalf of the South and North Koreas from June 1950 to an armistice in July 1953.

The immediate causes of hostilities have changed, but the fundamental reasons for the U.S.-China confrontation along the 38th Parallel North remain the same. China wants the U.S. out of South Korea – indeed out of Asia, as was constantly repeated during American intelligence gathering and freedom of navigation maneuvers around China's contested maritime borders.

https://www.cnbc.com/2017/09/25/the-korean-crisis-is-a-watershed-event-in-american-chinese-relations.html