East Asia (China, Japan, and the NIEs) ran a $600 billion current account surplus in 2017. "Official" (central bank and sovereign fund) outflows accounted for about half of that. Asia's foreign exchange market intervention isn't as overt as it once was, but also hasn't entirely gone away.
The first inter-Korean summit in ten years could be stage-managed by Kim Jong-un, but look for South Korea’s leaders to assert a role shaping the process for denuclearization talks.