Shenzhen is 3 hours behind Melbourne
Best overlap: 11:00 AM to 6:00 PM in Melbourne is 8:00 AM to 3:00 PM in Shenzhen.
The hours that work for both Melbourne and Shenzhen are 11:00 AM to 6:00 PM (Melbourne) and 8:00 AM to 3:00 PM (Shenzhen). 7 hours of shared hours is more than enough — slot meetings wherever they're most convenient for the people involved. One seasonal catch: Melbourne springs forward and falls back, but Shenzhen doesn't, so the gap changes by an hour for several months of the year.