Shenzhen is 1 hour ahead of Jakarta
Best overlap: 8:00 AM to 5:00 PM in Jakarta is 9:00 AM to 6:00 PM in Shenzhen.
If you set up a recurring sync, 8:00 AM to 5:00 PM in Jakarta (9:00 AM to 6:00 PM in Shenzhen) is the natural home for it. Because you share 9 hours of the workday, there's no need to compromise; book the time that suits the meeting, not the map.