Washington, D.C. is 12 hours behind Beijing
There is no standard 8-to-6 overlap. Someone joins early or late.
Washington, D.C. is 12 hours behind Beijing, so their typical working days don't line up at all. Plan on one side joining outside normal hours. A recurring slot that trades off between early mornings and late evenings usually works best. Because only Washington, D.C. changes its clocks, the overlap above isn't fixed; expect a one-hour shift when Washington, D.C. enters or leaves daylight saving.