看到官网上的一段话:
An internal passportis an identity document that can be compared to an identity card used in somecountries to control the internal movement and residence of people. Countriesthat currently have internal passports include Russia, Ukraine, and China. Thesedocuments are not a valid means of identification for the CFA Exam. An international travel passport is a document, issued by anational government, which certifies, for the purpose of international travel,the identity and nationality of its holder.