qqp question1: If you are a Chinese citizen of the HKSAR and hold a valid Mainland China home return permit (港澳居民來往內地通行證), can you enter Mainland China without it? question2: If you are a Chinese citizen of the HKSAR and hold a valid Mainland China home return permit (港澳居民來往內地通行證) can you work and study in Mainland China?