✔ 最佳答案
1. The child will be eligible for HKID.
The reason is the U.K. does not determine citizenship by place of birth, but parents.
In other word, unless the parents have British citizenship, the child is definitely a Chinese citizenship with Hong Kong Permanent Residence.
2. I assume you mean British citizenship instead of nationalities.
The best place to give birth depends on if you weigh British citizenship over Hong Kong Permanent Residence or vice versa.
For British citizenship, in order for your child to pass alone, he or she must live in the U.K. for at least 3 years in order to qualify. Unless you are currently living in the U.K. or plan your child to study in the U.K., keeping the citizenship for the next generations will be difficult. In this case, giving birth in the U.K. will be a better choice.
For Hong Kong Permanent Residence, Hong Kong Immigration Department can deny his application due to the fact he has a foreign nationality. But getting the residence will not be difficult as soon as your family live in Hong Kong (as it takes 7 years). In this case, Hong Kong will be a better choice.