The Faceoff with Jimmy Zhou was the last conflict of Syphon Filter: Dark Mirror. When the triad member tried to spread an unknown virus with pigeons, Gabe Logan broke into his apartment and dismantled the plan by killing the birds. He then fought off an army of guards sent to stop him and killed Zhou, who had taken Lian Xing hostage.
With the IPCA's victory, Zhou's triad was presumably disbanded.