Munich 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 Munich.
Target 3:00 PM to 6:00 PM in Shenzhen, which lands at 8:00 AM to 11:00 AM for the Munich side. Munich 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 Munich). For part of the year the maths changes: Munich observes daylight saving, Shenzhen does not, shifting the overlap by an hour.