How long can the railway leave after sending a letter to the exchange?

A week. According to the provisions of the Labor Contract Law, you can transfer within one week after the transfer letter is issued. Railways are the tracks of trains and other means of transportation. Cihai's interpretation of the railway is that locomotives are used to draw vehicles to form trains (or vehicles with their own power devices) and follow the rules. Railway transportation is a land transportation mode, in which locomotives are used to pull trains and vehicles on two parallel rails.