Which page of the household registration book do I need to copy to apply for a UK visa?

if you are unmarried, you need to copy the page of the permanent population registration card of both you and your parents, plus the page of the household homepage and the personal permanent information registration card of the head of household;

If you are married, you need to copy the permanent population registration card of you and your spouse, plus the household homepage and the permanent population registration card of the head of household; If you have a child and the child is a minor, you need to copy his permanent population registration card

The back of all permanent population registration cards that need to be copied, the information correction column, if there is any changed information, you need to copy it. If there are no comments or changes, you don't need to copy it

I hope it can help you.