Fast assemble: The installation time of a 20ft or 40ft container takes less than 1 day, and four workers can finish 5 unit/day. 1. Perfect for modular / prefab site offices, cabins, warehouse, villa, toliet, shop, hotel, camp, office. 2. Efficient, low cost designs that can be customized for end user requirements. 3. Easy for low skilled workers to assemble. 4. The light steel frame structure is strong and reliable. 5. Many modular units can be stacked and linked together to create more space.