What does double bedroom mean? Travel agencies often say it.

Answer: Double-berth generally refers to the sleeper of a train. It means that the travel agency organizes you to travel to a place. When you go there, you take the sleeper of the train, and when you come back, you also use the sleeper. Rather than waiting for ordinary groups like hard seats, it is mainly for mid-level groups. In addition, there are double flights, solo flights, single sleepers, etc., which refer to round-trip flights, one-way flights, and one-way sleepers respectively.