Korean business groups, according to Korea JoongAng Daily, hoped a meeting between President Moon Jae-in and Chinese leader Xi Jinping on the sidelines of the G-20 summit on Thursday in Berlin would resolve a diplomatic impasse over the Thaad missile defense system that has led to a stinging Chinese boycott of Korean goods.
Instead, Korea Inc was left sorely disappointed, the newspaper reported, as the meeting between the two leaders, their first since Moon was elected, simply reaffirmed the irreconcilable gap between the two countries on the controversial missile defense system known as Thaad.

The introduction by the U.S. of the THAAD missile system into Korea violates the 1953 Armistice Agreement.
Armistice Agreement (excerpt): The Commanders of the opposing sides shall cease the introduction into Korea of reinforcing combat aircraft, armored vehicles, weapons, and ammunition; provided however, that combat aircraft, armored vehicles, weapons, and ammunition which are destroyed, damaged, worn out, or used up during the period of the armistice may be replaced on the basis piece-for-piece of the same effectiveness and the same type.
https://www.ourdocuments.gov/doc.php?flash=true&doc=85&page=transcript
The Korean ledership is making a big, big mistake on this Thaad missle system. I predict the Chinese will teach the Koreas a lesson on never bite the hand that feeds you. The Koreans who are very good at ringing the register have totaly dropped the ball on this———–and China will make them pay!!