Shenzhen is 6 hours ahead of Johannesburg
Best overlap: 8:00 AM to 12:00 PM in Johannesburg is 2:00 PM to 6:00 PM in Shenzhen.
Book within 8:00 AM to 12:00 PM Johannesburg time (2:00 PM to 6:00 PM in Shenzhen) and both teams will be at work. Shenzhen is 6 hours ahead of Johannesburg, so you've got a workable 4-hour overlap — ideal for a standing meeting around 8:00 AM in Johannesburg (2:00 PM in Shenzhen).