They gave a professional and detailed consultation. Mine is a revision surgery, and they said there are remaining fat layers here and there. Putting those comments together, it seems like their style is to remove it thoroughly.
The hospital itself is run-down, and it seems like people would only come after doing a lot of research or through word of mouth. That aspect also made me expect that the director might have skill.
I still have not decided whether I will have surgery. The cost is also affordable.