I worked as a waiter in a five-star hotel, and the head waiter said: Yesterday (June 2), I touched the chopsticks of the guests when they were eating.

It depends on whether you have signed a labor contract. If you sign a labor contract and they dismiss you for this reason, you can complain to the local labor bureau and apply for compensation. If you don't sign, there's nothing you can do. There may be complaints from guests. Maybe the reason is that you did accidentally touch chopsticks, and the guest is a neat freak, or the other party makes trouble without reason, or there are some messy things in the personnel department that need people to leave their current jobs.