Hong Kong takes care of elderly immigrants.

If your mother is over 60 years old and has no other children in Hong Kong, you can apply for a one-way permit to settle in Hong Kong on the grounds of caring for your parents.

Your mother must be a non-permanent resident at present. If she goes on a one-way permit, there will be no problem. At that time, your father can also apply to settle in Hong Kong on the grounds that the elderly do not take refuge in their relatives.

If your mother didn't go with a one-way permit, I'm afraid it would be a little difficult, because the mainland account has not been cancelled yet. To apply for relatives' asylum immigrants, Hong Kong residents' Home Visit Permit is required. Non-permanent residents can only apply for a home visit permit immediately if they go there with a one-way permit, while those without a one-way permit can only apply after seven years as permanent residents.

1. It is clearly stipulated that children can only rely on their parents if both parents have settled in Hong Kong.

2. Children take care of their parents, and there is no clear stipulation that both parents must settle in Hong Kong.

Some public security bureau websites announce that one or both parents have settled in Hong Kong and Macao; Both parties are over 60 years old and have no children to take care of them.

Some websites of public security bureaus announce that their parents who have settled in Hong Kong or Macao are over 60 years old and have no children in Hong Kong or Macao.

I emailed your question to the Hong Kong Immigration Bureau yesterday and received a reply today. The email said:

The opening of individual cities in Hong Kong and Macao and the issuance of one-way permits to Hong Kong are all decided by the mainland and are not within the scope of implementation in Hong Kong.