Do all four-star hotel chains have to sell cards?

No, four-star hotel chains are regular hotels, and each hotel will set up security guards. In order to ensure the safety of check-in personnel, there will be no card selling phenomenon, so not all four-star hotel chains have to sell cards. Four-star hotel brands are: Vienna Hotel, Novotel Hotel, KEmotel Kemou Concept Hotel and Marriott Hotel, with perfect infrastructure and good security system.