Usually plausible
United States → Shanghai → Hong Kong SAR, if the onward booking is confirmed and the stay is inside the permitted 240-hour window.
US passport answer
As of the National Immigration Administration country list dated February 17, 2026, US citizens are not on the current unilateral 30-day visa-free list modeled on this site. But the public 240-hour transit policy used here does include US citizens when the route, onward ticket, port, and stay-area rules all fit.
The route needs to go from country or region A, through mainland China, to a different country or region B. Hong Kong SAR, Macao SAR, and the Taiwan region can count as valid third regions in the public transit interpretation used on this site.
A simple US to China to US loop is not the same as a third-country or third-region transit. If the real trip is a normal visit instead of onward transit, US travelers should assume the transit rule may not fit and should verify a visa path separately.
Route examples
United States → Shanghai → Hong Kong SAR, if the onward booking is confirmed and the stay is inside the permitted 240-hour window.
United States → Beijing → Japan, with the right port and stay-area fit for the current policy.
United States → Guangzhou → United States, because that route usually fails the third-country or third-region test.
This page compares the National Immigration Administration list of countries covered by unilateral visa exemption policies dated February 17, 2026 with the current 240-hour transit policy sources dated July 4, 2025 and November 3, 2025.
Unilateral visa-free country list
Visa-free transit policy interpretation
65-port transit notice