What do you mean by taking 20 dense maps and two dense maps?

This means that the photographer will provide customers with 20 original films at a time, and select 2 of them for fine post-processing and modification. Taking 20 intensive photos and two intensive photos means that the photographer provides the customer with 20 original pictures at a time, and selects two of them for fine post-processing and modification. This answer comes from the explanation of the service content and price list of many wedding photography institutions.