What is "carrying a bag"?

Literally: with, wrapped in. The implied meaning is that you can wrap it inside without buying other furniture or anything.

"Carrying a bag to stay" often appears in the real estate industry. At this time, it means that the house provided by the other party is a finely decorated house. If you can check in soon, just take the luggage, take the key and open the door without buying furniture and appliances. For real estate, furniture and household appliances are attached to the overall decoration, which is conducive to saving costs and increasing sales.