Is it wrong for the hotel manager to scold the employees for hitting them?

The one who is beaten can fight back, but fighting back is limited to self-defense and can't hit the other side.

Whoever strikes first, as long as he hits others and causes certain harm, can be punished in accordance with Article 43 of the Law on Public Security Administration Punishment. If a fight is caused by a civil dispute, the public security organ may mediate according to Article 9 of the Law on Public Security Administration Punishment, and if the parties reach an agreement, they will not be punished.

If the injured party is slightly injured or more, then a criminal case can be established, and the procuratorate cannot mediate and prosecute. However, for this kind of minor injury cases, the court basically focuses on mediation, and at most it is sentenced to criminal detention.