The criteria to be issued a Mainland Travel Permit for Hong Kong and Macao Residents (港澳居民來往內地通行證), colloquially known as the Home Return Permit or
Home Visit Permit (
回鄉證), are:
- 在香港出生， 具有中國國籍的香港永久性居民。
- 內地居民經批准赴香港定居，取得香港居民身份的；
- 在香港以外出生的的中國籍居民，已確立香港永久性居民身份的。
- 香港永久性居民中的外國籍或者無國籍人士，經批准加入或恢復中國國籍的。
- 符合以上四點已申領回鄉證人士，因證件有效期滿、損壞、個人資料變更或遺失，可申請換（補）領 新的回鄉證。
Number 4 could possibly apply - but it says you must be approved to resume PRC citizenship, which indicates that a HRP held when you previously had PRC citizenship would no longer be valid.
The HRP is acknowledgment by the mainland that you are a PRC citizen, so voluntarily renouncing your PRC citizenship effectively means choosing to give up your HRP.
I assume
PaulC852 is correct that renouncing PRC citizenship but having lived in HK for 7 years would get you an HKID without stars, however HK Immigration has been erroneously issuing non-PRC citizens who lived in HK for 7 years with *** for years, and I'm not talking about people who are regarded as PRC citizens according to the mainland's nationality law because they were born in HK or descended from someone born in HK.