These equipments are usually mounted on Tai'an trucks. This basic formation can be expanded into more capable larger formation, with the addition of the following equipment: one TWS-312 command post, one site survey vehicle based on Chinese Humvee, one main power grid converter, additional transporter / loader vehicles with each vehicle housing four missile TELs based on Tai'an TAS5380, one Type 120 low altitude search radar, one HT-233 PEAS long-range search radar. HQ-9 systems are highly mobile, various units have completed conducting long distance maneuver and drills, including units in southern China participate in live firing exercises in northwestern China.[9]