The first shift is at 5:40 and the last shift is at 22:20. According to the Suzhou Local Treasure Network, Suzhou Metro Line 3 has 37 stations. The earliest operating time is 5:40 am and the latest is 22:20. The subway is a type of urban rail transit line system. It refers to a rail transit built in the city that is fast, large-capacity, and powered by electricity. The trains run on fully enclosed lines. Lines located in central urban areas are basically located in underground tunnels. In addition to being laid underground, subway lines can also be laid on elevated roads or on the ground. Therefore, subway lines can have exclusive rights of way and no level crossings.