Are we sure UPS176 is it? when I look at its schedule on FlightAware it doesn't show one for today to China and still shows that it's in Seol.
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It usually goes to China after Seoul -- like the one in the screenshot I took from 2 days ago. So there's a lot of assumption here, but there's a good chance it's the one. Let's see if it takes off within the next two hours.