How is it that ktv in Chenzhou, Hunan Province smashed the muscles of customers' hands?

The reason is that the customer had a quarrel with the KTV waiter, and then they started. Several security guards at KTV swarmed and punched and kicked customers, which made the situation worse. When this farce should have ended, a security guard actually picked up a customer's hamstring directly. As far as I know, the KTV is underworld, and the boss behind the scenes has backstage figures, so he dares to indulge his men. However, KTV bosses generally have a gangster background or a white road of general social forces, otherwise it is difficult to afford it. That's all we know now, and the rest is unclear, but sensibility and rationality are the responsibility of KTV. Anyway, it is wrong for you to start work, and what happens will be followed up.