Copenhagen is 6 hours behind Beijing
Best overlap: 2:00 PM to 6:00 PM in Beijing is 8:00 AM to 12:00 PM in Copenhagen.
2:00 PM to 6:00 PM in Beijing is when Copenhagen is also working, at 8:00 AM to 12:00 PM their time. Because Copenhagen is 6 hours behind Beijing, the 4-hour overlap is your golden hours — 2:00 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.