Copenhagen is 7 hours behind Shenzhen
Best overlap: 3:00 PM to 6:00 PM in Shenzhen is 8:00 AM to 11:00 AM in Copenhagen.
Book within 3:00 PM to 6:00 PM Shenzhen time (8:00 AM to 11:00 AM in Copenhagen) and both teams will be at work. Copenhagen is 7 hours behind Shenzhen, so you've got a workable 3-hour overlap — ideal for a standing meeting around 3:00 PM in Shenzhen (8:00 AM in Copenhagen). For part of the year the maths changes: Copenhagen observes daylight saving, Shenzhen does not, shifting the overlap by an hour.