SAR's have their own legal systems, immigration and customs controls and currencies. In fact, they are almost like separate countries in this respect. The two SAR's also issue their own passports to Chinese citizens who are [[Permanent Resident]]s of their respective SAR's. While these passports are still Chinese Citizen passports, their holders are generally given much more favorable immigration treatment abroad than holders of Chinese passports issued by the Mainland authorities | SAR's have their own legal systems, immigration and customs controls and currencies. In fact, they are almost like separate countries in this respect. The two SAR's also issue their own passports to Chinese citizens who are [[Permanent Resident]]s of their respective SAR's. While these passports are still Chinese Citizen passports, their holders are generally given much more favorable immigration treatment abroad than holders of Chinese passports issued by the Mainland authorities |