Miami is 13 hours behind Shenzhen
There is no standard 8-to-6 overlap. Someone joins early or late.
Shenzhen and Miami have no natural overlap. The 13-hour gap is simply too large for regular working hours to meet. Treat the handoff like a relay — Miami wraps up and leaves notes for Shenzhen to pick up as their day begins. The difference isn't constant year-round: Miami adjusts for daylight saving while Shenzhen holds steady.