Copenhagen is 7 hours behind Beijing
Best overlap: 3:00 PM to 6:00 PM in Beijing is 8:00 AM to 11:00 AM in Copenhagen.
3:00 PM to 6:00 PM in Beijing is when Copenhagen is also working, at 8:00 AM to 11:00 AM their time. Because Copenhagen is 7 hours behind Beijing, the 3-hour overlap is your golden hours — 3:00 PM in Beijing maps to 8:00 AM in Copenhagen for a dependable slot. Heads up: because Copenhagen changes its clocks and Beijing doesn't, the difference moves by an hour twice a year. Confirm the overlap around the DST switch.