All open exit-entry ports in China implement this policy for nationals of all other countries around the world.Foreign nationals transiting through China to third countries or regions may stay in China for no more than 24 hours without a visa, provided that they hold valid international travel documents and onward international flight/ship/train tickets with confirmed seats, and will not leave the restricted areas of ports.
For any foreign national who does need to leave the designated restricted area, a temporary entry permit must be obtained first at the immigration inspection authority of the port concerned.