4 If the aliens leave China,what documents should they present to the frontier inspector? Aliens should present their valid passports and departure cards to frontier inspector for examination. Aliens who hold residence certificates issued by the Chinese Government and who are not to return,should turn in the residence certificates.10 4 If the aliens leave China,what documents should they present to the frontier inspector? Aliens should present their valid passports and departure cards to frontier inspector for examination. Aliens who hold residence certificates issued by the Chinese Government and who are not to return, should turn in the residence certificates