Nairobi is 5 hours behind Shenzhen
Best overlap: 1:00 PM to 6:00 PM in Shenzhen is 8:00 AM to 1:00 PM in Nairobi.
For the smoothest call, aim inside 1:00 PM to 6:00 PM in Shenzhen, i.e. 8:00 AM to 1:00 PM in Nairobi. Nairobi is 5 hours behind Shenzhen, so the practical overlap is about 5 hours — generous enough for meetings, tight enough to be worth booking ahead.