1. At present, there are generally 1 18 trains, and some also have 1 12 trains. Because there is a conductor's room, there are 2+2 trains at the head and tail, which are divided into 1, 2, 3, 4 and 650.

2. The number of seats by the window of the train is a number ending with 4, 9 or 0, 5, 4 and 9 are two seats by the window, and 0 and 5 are three seats by the window.