How to add Hainan one-yard health code to Hong Kong?

Enter your residential address in Hong Kong. If the address belongs to public rental housing under the Hong Kong Housing Authority, the applicant does not need to provide proof of address. Otherwise, the applicant can choose to upload the address certificate or indicate that there is no address certificate. [Note: After the address of public housing is successfully verified by the Hong Kong Housing Authority, or the address certificate uploaded by the applicant is successfully verified, the applicant will receive the PIN code through SMS. If the address certificate uploaded by the applicant is invalid, the applicant must re-register. If the applicant does not have an address certificate, or the uploaded address certificate is found suspicious after verification, the system will issue a personal identification code through the postal service. After receiving your PIN code, please log on to the Hong Kong Health Code website and enter your PIN code to activate your account.