In accordance with international practices, China has adopted a 24-hour visa-free transit policy for foreign nationals of multiple countries at all international ports of entry. Any passenger holding interline tickets with confirmed seats to transit to a third country or region via China by international flights, sea vessels, or trains does not have to apply for a visa if his/her stay period in China is less than 24 hours and he/she does not leave the port of entry. In the case where the passenger concerned needs to leave the port, a temporary entry permit from the entry/exit border inspection authority at the port shall be required.

Foreign nationals from 54 countries are currently eligible for the 72/144-hour transit visa-free policies which are effective at 31 ports in 23 cities of 18 provinces in China. These countries include Albania, Argentina, Australia, Austria, Belarus, Belgium, Bosnia and Herzegovina, Brazil, Brunei, Bulgaria, Canada, Chile, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Japan, Latvia, Lithuania, Luxembourg, Malta, Mexico, Monaco, Montenegro, the Netherlands, New Zealand, North Macedonia, Norway, Poland, Portugal, Qatar, the Republic of Korea, Romania, Russia, Serbia, Singapore, Slovakia, Slovenia, Spain, Sweden, Switzerland, Ukraine, the United Arab Emirates, the United Kingdom, and the United States. Passengers from these countries holding valid international travel documents and interline tickets with confirmed dates and seats, who are going to transit to third countries (or regions) via China within specific time frames, can apply for visa-free transit at the entry/exit border inspection authorities in the designated visa-free transit city ports. The authorities will handle all temporary entry procedures, with the duration of stay of each passenger to be calculated from 00:00 on the day following entry.
Below is a list of China's city ports implementing in the 72/144-hour transit visa-free policies:

Source: National Immigration Administration