All open ports in China implement a 24-hour visa-free transit policy for travelers from all countries. Foreign nationals holding valid international travel documents and a confirmed onward ticket for an international flight, ship, or train transiting through China to a third country or region can stay in China for up to 24 hours without a visa, provided they do not leave the port. If they need to leave the port, they must apply for a temporary entry permit from the border inspection authorities at the port.
Author:TravelChinaBook,Please indicate the source:https://travelchinabook.com/24-hour-visa-free-transit-in-china.html
