Originally Posted by
dtsm
It is my understanding that a HKSAR passport means you are a citizen of the HK SARS and not 'China'. You have no rights of a Chinese citizenship, you cannot travel in/out of China with just a HKID and HKSARS passport [you need a Hui Xiang Zheng, 回乡证], you cannot own property in China, you cannot vote in China.
You are correct about travel requirements, and I have no idea about buying property. BUT, Hong Kong SAR is part of China, and having a HKSAR passport does mean one is a Chinese citizen.