1. The business scope is mainly in Hanoi, Vietnam, and the main business is providing waterproofing construction services, including waterproofing for roofs, basements, swimming pools, etc. 2. It belongs to a local professional service provider in the construction services industry, with competitors including other local waterproofing companies. 3. The official website brand keywords are "Bách Khoa" or "Chống Thấm Dột Bách Khoa".