1. The business mainly operates in Hong Kong, providing comprehensive waterproofing and leak repair engineering services for residences, tenement buildings, commercial buildings, and historic buildings. 2. In the building maintenance industry, it is a local professional team in Hong Kong with more than 10 years of experience. Competitors include other Hong Kong waterproofing engineering companies. 3. The official website brand terms are "水立防科技防水（香港）" or "水立防".