Over the next two days, Washington's point man on North Korea has a series of meetings lined up with senior South Korean officials in Seoul .
Earlier Wednesday, U.S. Special Representative for North Korea, Stephen Biegun, met his South Korean counterpart, Lee Do-hoon.
They're expected to have coordinated their strategies on working-level negotiations with North Korea... and discussed the regime's recent missile launches.
Biegun will meet Seoul's Unification Minister Kim Yeon-chul in the coming hours.
On his last day in Seoul on Thursday, the U.S. envoy will meet the deputy chief of Seoul's National Security Council, Kim Hyun-chong, before heading to China.