Economy Key moments in North Korea-China relationship Updated : March 30, 2018 07:40 AM IST North Korea and China establish diplomatic relations. China intervenes in the Korean War and engages in combat with U.S.-led forces, saving North Korea from defeat. North Korea founder Kim Il Sung visits China, shortly after China withdraws troops from the Korean Peninsula. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.