Passenger information system (PIS) for CRH5 and CRH3 mainly realizes three key functions: Public broadcast guidance, audio and video entertainment, and internal transmission. It automatically offers digital voice station report, arrival and departure time, information on railway line, interior and exterior temperature, train speed and multi information with interior and exterior display screen and load speaker,. It can also offer passengers access to audio and video entertainment program with television and seat receiver. Moreover, it can implement internal communication and manual voice message delivery.