It was the second time in two days the foreign ministry had condemned the remarks - on Sunday, spokesman Qin Gang said the ministry "resolutely opposes" the US remarks.
He said the unit had lost two men in the past month - one caught in crossfire in a similar operation, the other ambushed by a gang wanting to steal his gun.
The fact that the film, starring Mark Wahlberg and Dwayne "The Rock" Johnson, is an action-comedy has angered survivors of the Sun Gym gang's crimes and those who investigated them nearly two decades ago.