Can I give up after I get the permanent residency in Hong Kong?

Legal analysis: it can be abandoned. According to the Service Guide for Issuing Residence Certificates for Hong Kong and Macao Residents issued by the State Administration of Immigration, former mainland residents who have been approved by the public security organs to settle in Hong Kong and Macao may apply to settle in the Mainland. The applicant must personally apply to the exit-entry administration of the public security organ at or above the county level where the original account is located (Guangdong Province is accepted by the public security department of the public security organ) and accept interviews and inquiries.

Legal basis: Interim Measures for the Administration of Private Travel between China Citizens and Hongkong or Macau.

Eighteenth Hong Kong and Macao compatriots who wish to settle in the mainland shall apply to the municipal or county public security bureau in advance. After approval, with the "Home Visit Permit for Hong Kong and Macao Compatriots" and the endorsement of returning home, the permanent residence formalities will be handled at the place of residence.

Twenty-first Hong Kong and Macao compatriots home visit permit shall be kept by the holder, valid for ten years, and can be used many times during the validity period. If the validity period expires or the check page runs out, a new card can be issued. The application for renewal of a new certificate shall be handled in accordance with the provisions of Article 14 of these Measures.