240h route assumptions
- Example origin airports: SFO, LAX, LHR, SYD
- Mainland entry / exit: PVG → PVG
- First stop after mainland China: ICN
- Planned stay areas: Shanghai, Zhejiang, Jiangsu
Why this route shape works: Same mainland entry/exit port is fine if the onward destination after China is a different country/region.
Watchpoint: PVG in / PVG out is not the issue. The issue is A→China→B: your pre-China stop and post-China stop cannot be the same country/region.