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HAMBURG, GERMANY - JULY 7, 2017: South Korea's President Moon Jae-in (L) and Russia's President Vladimir Putin hold talks as they meet on the sidelines of a G20 summit. Mikhail Klimentyev/Russian Presidential Press and Information Office/TASS (Photo by Mikhail Klimentyev\TASS via Getty Images)

HAMBURG, GERMANY - JULY 7, 2017: South Korea's President Moon Jae-in (L) and Russia's President Vladimir Putin hold talks as they meet on the sidelines of a G20 summit. Mikhail Klimentyev/Russian Presidential Press and Information Office/TASS (Photo by Mikhail Klimentyev\TASS via Getty Images)