September 28 is the first anniversary of BJL4, BJMTR announced recently that it will issue a set of tickets titled “Event of Rainbow” as a souvenir of the occasion.
"Event of Rainbow” extends the concept of rainbow, it uses 6 events that closely related to passengers to record experiences in this year: “Open Day, Tour Day”, “24-hour Service on National Day”, “Change of Door Closing Beep”, “Welcoming the 100,000,000th Passenger”, “Addressing Large Passenger Flow over 1 Million on Labor Day”, “Inviting Primary School Students to be Safety Ambassador” and “Sharing Ideas on Low Carbon Lifestyle with Passengers”.
The tickets are in 2 versions – a commemoration version and a deluxe version, both are issued in limited copies and bear a serial number.