Can brothers and sisters open a bidding room?

Brothers and sisters are allowed to share a room when staying in a hotel. They are brothers and sisters, not other relationships.

In fact, as long as it is an adult, the hotel has no strict restrictions on this piece. As long as it doesn't involve other illegal things, it is completely ok for the brother and sister to open a house. This has no effect.

As long as you can provide valid identity documents, you can move in, and you don't need to prove that you are a brother and sister.