The Sichuan Aerospace Industry Corporation (SCAIC) has developed the 400 mm WS-2 (Wei Shi 2) Guided Multiple Rocket Weapon System (GMRWS).

This system is understood to be carried on the rear of an 8 × 8 cross-country truck chassis, with the powered launcher with two layers each of three launch tubes mounted at the rear. To provide a more stable firing platform, stabilisers are lowered to the ground by remote control.

Some sources have indicated that the overall system has been developed by the China National Precision Machinery Import and Export Corporation (CPMIEC).

It is considered possible that CPMIEC is the overall contractor, with SCAIC responsible for the actual guided rockets that can be launched from the cab or away from it with the aid of a remote-control system. CEP is being quoted as 600 m and a maximum flight speed of Mach 5.6.

The rockets can be fitted with the following types of warhead to meet different user requirements:

• Submunition carrying 540 bomblets with a High-Explosive Anti-Tank (HEAT) warhead that is also highly effective against troops. The HEAT warhead will penetrate up to 85 mm of conventional steel armour and has a lethal radius of 7 m

• Comprehensive effect cluster warhead carrying 61 sub-munitions with each sub-munition warhead containing approximately 200 preformed fragments and a shaped charge. It is claimed that the shaped charge will penetrate 180 mm of conventional steel armour. In addition the warhead also has a incendiary area effect of about 50 m sq (4 m radius)

• Fuel air explosive (FAE) called 'Cloud blasting warhead' by the company. This contains 120 kg of FAE and produces a high blast overpressure upon functioning (both duration and peak pressure). The over pressure is quoted as 0.1 MPa (29 psi) at 25 m and 0.02 MPa (2.9 psi) at 50 m. No data on pulse duration is provided

• High-explosive fragmentation incendiary which is called 'Blast burning warhead' by the company. This contains an undisclosed quantity of high explosive and incendiary pellets in addition to approximately 40,000 spherical steel preformed fragments. The lethal radius is claimed to be 85 m

• High-explosive fragmentation called 'Lethal blasting warhead' by the company. It contains about 38,000 spherical pre-formed fragments and is claimed to have a lethal radius of 85 m