Accra is 8 hours behind Shenzhen
Best overlap: 4:00 PM to 6:00 PM in Shenzhen is 8:00 AM to 10:00 AM in Accra.
Keep meetings inside 4:00 PM to 6:00 PM in Shenzhen — that maps to 8:00 AM to 10:00 AM in Accra. Accra is 8 hours behind Shenzhen, so you only get about 2 hours of overlap a day — worth locking in a standing time like 4:00 PM in Shenzhen (8:00 AM in Accra) before it slips.