<P> Contrary to the transit rules of other countries, all travelers in transit are required to go through immigration and customs even if they do not intend to leave the airport, except for passengers arriving and departing from Beijing Capital International Airport where they can proceed directly to the sterile transit area without immigration checks . </P> <P> Leaving the transit area is allowed even for passengers who only have one transit point within Mainland China, however they must also depart China within 24 hours . </P> <P> Unlike the 72 / 144 - hour TWOV, most nationalities are eligible for the 24 - hour TWOV except those listed below . Some individual airports, however, impose their own restrictions on certain nationalities . </P> <P> While a majority of Chinese international airports have no extra requirements for the 24 - hour TWOV, certain airports place their own restrictions mandated by the local authorities . </P>

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