An army of robots working nonstop 24/7 in a sorting center of STO Express transport company in Tianjin China. Small orange robot automatically identify each packet through a QR code and the deposit in the indicated position, thereby ensuring the daily screening 200.000 Mail packets inside a huge warehouse.

The robot tirelessly spend one next to the other without ever colliding, and when the battery begins to end, automatically connected to a charger. Thanks to this system, the STO Express company claims it has reduced its payroll by 70%.