Do China people need to go to the public security bureau for filing when they come to Vietnam for a three-month visa to stay in a hotel?

Need. Report the case to the local police station at least 3 days in advance, and provide corresponding supporting materials such as passport, valid identity certificate, business license, real estate license (house purchase contract), rental contract, valid labor contract, official business travel certificate, etc. You can't go to Vietnam until you approve it. After going to Vietnam, you should report to the China Embassy and Consulate in Vietnam as soon as possible, and register with the local public security bureau as soon as you arrive in Vietnam to ensure legal entry and avoid unnecessary troubles.