Shanghai is 2 hours ahead of Dhaka
Best overlap: 8:00 AM to 4:00 PM in Dhaka is 10:00 AM to 6:00 PM in Shanghai.
The hours that work for both Dhaka and Shanghai are 8:00 AM to 4:00 PM (Dhaka) and 10:00 AM to 6:00 PM (Shanghai). 8 hours of shared hours is more than enough — slot meetings wherever they're most convenient for the people involved.