A passenger extracts toilet paper from a machine using facial recognition technologies in Harbin Railway Station on Jan 27. To provide convenience for passengers, Harbin Railway Station recently introduced five face recognition machines in its toilets, which enable passengers to extract free toilet paper by scanning faces. While, the same passenger can not extract toilet paper if he or she has once used the free service within 10 minutes, an effort for the railway station to avoid waste.[Photo/MY399.COM]