1. Flood Control.
Most of People used as the bulwark all over the river, unfold it and filled with sand or earth, instad of sandbags, it is easy to operate and efficacious.
2. Military Defence
Most of army used for protection, because the bullet can not penetrate it easily, it can prevent explosion, and not easy to destroied.
3. Hotel Pretection
A lot of Superior Hotel used as the protection wall outside, safety, and beautiful.