im a pakistani passport holder and uae residence visa how i will apply for hong kong and china visa?

I'm not sure whether you can apply the entry permit for mainland by yourself. You can get contact with the embassy in Abu Dhabi for confirmation. If you can, you should go to the embassy and submit the required documents. As for Hong Kong entry permit, you can submit the application to the embassy or mail it to the Hong Kong Immigration Department.

Tel. No. of the embassy: +971-2-4434276

simple way is send your documents to Hong Kong immigration department ( including all required documents) with visa fee, they will send you visa sticker through DHL at your given address.