Traditional Culture Encyclopedia - Weather inquiry - Why is z 172 often late?

Why is z 172 often late?

1, long route.

2. During this period, the passengers are relatively concentrated and the passenger flow is dense.

3. At present, a large number of passengers are running, the railway transportation capacity is in a state of supersaturation, and the difficulty of train operation adjustment is obviously increased.

4. The complicated and changeable weather in Spring Festival travel rush will cause the passenger train to be delayed.