According Chinese military, the A300 is a two-stage artillery rocket designed based on the current A200 hybrid rocket system. China Aerospace Science and Technology Corporation has extended the attack range of the A300 to 290 kilometers from the A200's 200 kilometers.
It has a larger engine which can boost an unpowered second stage with vanes for lift and control fins directed by an inertial measuring unit-navigation satellite guidance system.
The A300 rocket is able to carry a 150 kg warhead. It has a maximum range of 300 km, a 30 to 45 meters circular error probable (CEP) and can engage eight targets in a 20 km by 20 km area.
The A300 uses a combination of inertial measuring unit and GPS guidance that gives the former a CEP of 30 m and the latter a CEP of 30 m when using a unitary warhead and 45 m with a "shaped-charge fragmentation cluster" warhead.
In case of export limitation for range, Bangladesh can enter a joint development program with China (as a proxy) and get the system. This is the deterrence Bangladesh immediately needs instead of tanks even those useless trainer aircraft.
Reference:
http://www.armyrecognition.com/apri..._launch_rocket_system_using_gps_guidance.html