When you call Ernie back to report success he instructs the team to bring the tong members and drugs to the address previously given for where they were to hide the drugs. When they get their they will need to kill everyone present and stage the scene as a drug deal gone bad.
The assault goes well as the gang members are nearly completely unprepared. The biggest surprise is a low level ward surrounding the property. The gang members on the main floor of the house were caught completely unprepared, and the members on the second floor were under-armored and under-gunned for the opposition they faced. After the gang members were killed or knocked unconscious the captured triad members were brought into the house and executed to stage a scene that hopefully will not be looked at in significant detail.