Is it illegal for a hotel to disclose guest information?

Illegal. Legal basis: Article 253-1 of the Criminal Law of the People's Republic of China. Anyone who violates relevant state regulations by selling or providing citizens' personal information to others, if the circumstances are serious, shall be sentenced to fixed-term imprisonment of not more than three years or criminal detention, and shall also or a fine alone; if the circumstances are particularly serious, the offender shall be sentenced to fixed-term imprisonment of not less than three years but not more than seven years, and shall also be fined. Anyone who violates relevant national regulations by selling or providing citizens’ personal information obtained in the course of performing duties or providing services to others shall be severely punished in accordance with the provisions of the preceding paragraph. Anyone who steals or illegally obtains citizens’ personal information through other methods shall be punished in accordance with the provisions of paragraph 1. If a unit commits the crimes in the preceding three paragraphs, the unit shall be fined, and the persons directly in charge and other directly responsible persons shall be punished in accordance with the provisions of the respective paragraphs.