What is a hotel blacklist? Please tell the insider in detail. Thank you.

1. There is a blacklist of people between hotels. Hotel employees who fail to perform well will be fired. Other hotels won't talk.

2. List the hotels and restaurants that have been identified as unqualified by local functional departments to warn tourists.

3. The blacklist made by the hotel for the guests who come to the hotel for consumption. Warn other hotels that the guest has had bad consumption behavior.