The train diagram is generally adjusted four times a year, that is, once every quarter. From the beginning to the end of the map adjustment, it will generally return to normal within two weeks. If the train diagram is adjusted, notice will generally be given in advance. In addition, the number of trains that generally show "train diagram adjustment, suspension of sale" will be sold, but the time of sale needs to be announced by the railway department.

What needs to be understood is that for those who have travel plans in the near future, it is best to plan the route in advance. If the train diagram is adjusted, it is best to leave enough time to adjust the route. Usually, when the train is running, it needs to follow the requirements of the running diagram, that is to say, before taking the train, there is a clear running diagram for the train's walking route, which can't be changed at will. However, due to the economic development and people's travel in many places, the current operation chart is not enough to meet people's demand for transportation, so it is necessary to make some adjustments to the operation chart.

To sum up, most of the stopped trains will change. The general railway department will announce the time to resume ticket sales some time before the implementation of the map adjustment. The announcement can be viewed through the "Latest Announcements" at the bottom of 12306 website.

Legal basis:

Regulations on the safety protection of railway transportation

Article 5

Units engaged in railway construction, transportation, equipment manufacturing and maintenance should strengthen safety management, establish and improve the safety production management system, implement the main responsibility of enterprise safety production, set up safety management institutions or equip safety management personnel, implement national standards and industry standards, ensure production safety and product quality and safety, strengthen the safety education and training of employees, and ensure the necessary capital investment for safety production.