Patent problem: My scheme has the same structure as the existing patent, but our technical backgrounds are different and the problems we want to solve are different (see below).

You can try to apply for a special method, mainly depending on whether there is a big gap between the existing fields where the structure is applied and the fields where you want to adopt the structure. If it is the same or similar fields, you have to find an agent to help you. If there is a big gap, especially if anyone has used it like this now, there is great hope.