Derived from the 200 km-range A200, CASC's 290 km-range A300 is an innovative two-stage artillery rocket. A larger engine boosts an unpowered second stage with vanes for lift and control fins directed by an inertial measuring unit-navigation satellite (IMU/GPS) guidance system.
It may have a 150 kg warhead and according to a Chinese source could have a range greater than 300 km in PLA service. According to promotional material, the missile has a 30 to 45 m circular error probable (CEP) and can engage eight targets in a 20 km by 20 km area.
An A300 purchase indicates the SAC may also be acquiring the 280 km-range single-stage M20 SRBM. In one configuration shown by China Aerospace Science and Industry Corporation (CASIC), a 8x8 Tai'an transporter erector launcher (TEL) carries one M20 and four A300s.
CASC‘s General Army Tactical Strike System (GATSS)
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ALIT catalogue shows the ranges of its various surface-to-surface ballistic projectiles.
Source: China Aerospace Long-March International