What is a double bedroom?

It means that the two round-trip transportations during travel are sleeper trains.

In travel itineraries, sometimes it is necessary to travel long distances. In order to provide passengers with rest and comfort, sleeper trains are chosen as a mode of transportation. Double sleeper means that journeys in both directions will be in a train sleeper.

For example, if there is a tourist route that is a five-day two-bedroom tour from Shanghai to Hainan, then you will take a sleeper train from Shanghai to Hainan, and then take a sleeper train back to Shanghai after the tour. Such an arrangement allows travelers to have a rest and a comfortable environment during long journeys, while also saving on accommodation costs.