Flying Tiger is one of the characters in CrossFire. They are also known as Special Duties Unit, an elite paramilitary tactical unit of the Hong Kong Police Force. Its primary functions include counter-terrorism, hostage rescue and dealing with crimes (usually involving firearms) which are considered too dangerous for regular police to handle. The unit was formerly trained by the SAS before the handover of Hong Kong to China. In CF China, Flying Tiger has their own Chinese voice, similar to Delta in CF Korea.