sentences:  Because TY/DY-90 is a fire and forget weapon, no modification is needed for the fire control system of the original SG ADS.During the 5th Zhuhai Airshow held at the end of 2004, a mobile land based air defense variant of TY-90 was revealed, dubbed as LS ADS, short for Lie-Shou (猎手, meaning Hunter) Air Defense System.Eight TY-90 in two groups of four are mounted in the back of a Dongfeng (东风, East Wind) EQ2050 Iron Armor (Tiejia, 铁甲) High Mobility Multipurpose Wheeled Vehicle (HMMWV), and the fire control system consists of electro-optics including laser, IR & TV, mounted between the two quadruple launchers.