答：根据规定，72小时过境免签政策是针对在北京或上海过境前往第三国或地区的规定国家外国人。

Answer: : According to the requirements, the 72-hour transit visa exemption measure is for a foreign national passing through Beijing or Shanghai for a third country or region.

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答：办理72小时过境免签手续的外国人不得离开北京或上海行政区域。

Answer: : a foreign national with the 72-hour transit visa exemption may not leave the administrative precincts of Beijing or Shanghai.

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外国人办理72小时过境免签手续入境后因特殊原因无法在72小时内及时离境，该怎么办？

What should be done in case a foreign national who has the 72-hour transit visa exemption cannot leave China within 72 hours due to some special reason after entry?

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