Materials: Carton, plastic basket, tray, bamboo mat
Intelligence: vending on illegal places
Explanation: Space is never enough for people selling their goods in such a high-density district, so they occupies public places like arcade, sidewalk or even street in front of their store to do more business. The “extensions” should be easy to move into their store quickly when police coming and extend out of the store when police left. And another kind of illegal vendors are mobile vendors. They use both-side opened carton to support their goods in the tray. They pour all their goods into the carton down below and ran away when police comes.