A Chinese deliveryman in Queens was robbed, viciously beaten and stabbed to death by a pair of 16-year-old thugs who then dumped his lifeless body in a park, cops said.

The body was dumped Friday night, but went undiscovered until yesterday morning.

Huang Chen, 19, was found dead in a pond inside Brookville Park at Brookville and 147th avenues at 8:45 a.m. with a plastic bag over his head, a law-enforcement source said.

His head had been beaten, possibly with a baseball bat, and he had several stab wounds in his chest, cops said.

The teen was making a delivery from his family's Guy Brewer Boulevard restaurant, Ming Garden, to a 127th Avenue apartment in Rochdale Village on Friday night and never returned to work.

The restaurant did not hear from Chen for hours and called the cops, who went to the address to which he made his last delivery.

There they found Nayquan Miller with blood on his shirt, trying to wipe away blood splattered on the apartment's ceiling with bleach, sources said.

Soon after cops starting questioning Miller, he gave up his friend, Charles Bryant, who allegedly had a hand in the ferocious attack. Bryant was later picked up at his Rosedale home.

The two have been charged with murder, robbery, criminal possession of a weapon and tampering with evidence.

Cops removed a number of items from Miller's apartment - including a knife, a baseball bat and other objects - which cops believe could have been used in the attack.

"He's just a quiet kid. I'm shocked," said Annette Kellerman, 46, a neighbor of Miller's who said that her husband had noticed a blood trail on a ramp leading up to a building side entrance.

While red, white and blue memorial candles burned bright outside Chen's family restaurant, one city politician said he is tired of seeing immigrant workers attacked and is calling for immediate recourse in the teen's death.

"I am going to be looking for a swift and complete action by law-enforcement agencies to send a strong message that we're not going to have open season on hard-working immigrant workers in this city," said City Councilman John Liu of Queens.

Liu told The Post deliverymen such as Chen are "easy marks" who are repeatedly placed in situations that are "potentially dangerous."