Former B2K singer Raz-B was hospitalized in China yesterday after someone smashed him in the mouth with a glass bottle … turning his face into a bloody mess.

Raz-B-the-former-B2K-singer-was-hospitalized-in-China-yesterday

The 28 year old, real name De’Mario Thornton, was performing at a nightclub in Zhejiang when a fight broke out in the crowd. The star allegedly tried to break up the altercation when he was smacked in the face with a glass bottle.

Raz-B was arrested, along with the two warring crowd members, but subsequently released without charge.

We’re told the Chinese police immediately stepped in … grabbing the attacker AND Raz — and dragging them both to jail.

Cops quickly released Raz after determining he did nothing wrong. Raz’s rep says cops made the bottle thrower fork over roughly $5,000 to pay for Raz’s medical expenses.

After the drama at the police station, Raz was finally taken to a hospital, where he underwent a 1-hour surgical procedure to repair the “hole” in his lip. The wound also required 4 stitches.