240h route assumptions
- Example origin airports: HKG, ICN, SIN, BKK
- Mainland entry / exit: TFU → CKG
- First stop after mainland China: SIN
- Planned stay areas: Sichuan, Chongqing
Why this route shape works: Different entry/exit ports in western China: enter Chengdu, exit Chongqing to a third country/region.
Watchpoint: Sichuan has city-level stay-area limits under the official table. Keep the route to the listed cities and avoid assuming the whole province is open.