Weishi Rockets The Weishi , 卫士 , literally " Guardian " , ( WS ) family of the multiple launch rocket systems were mainly developed by Sichuan Aerospace Industry Corporation ( SCAIC , also known as Base 062 ) in Chengdu , Sichuan Province . The Weishi series rocket systems include the 302mm WS - 1 ( 100 km range ) , the improved 302mm WS - 1B ( 180 km range ) , the 122mm WS - 1E ( 40 km ) , the 400mm WS - 2 ( 200 km range ) , as well as many other models . The WS - 1 series weapon system did not enter PLA service and has order from Thailand . The WS - 2 may finally see PLA service in the future . It ' s worth noticing that although sharing the same name , there are other developers for different models of Weishi series multiple rocket launcher s ( MRL ) other than the primary developer SCAIC . WS - 1 . SCAIC began to develop an unguided large - calibre multiple launch rocket system for the PLA ground forces in the late 1980s . The resulting Weishi - 1 ( WS - 1 ) 302mm , 4 - tube multiple rocket system was first tested in 1990 . However , the weapon system failed to impress the PLA , and no production order was received . The ground equipment of the WS - 1 comprises : a rocket launch truck , a transport and loading truck and a firing command truck . A WS - 1 rocket battalion is equipped with : WS - 1B . SCAIC continued the WS - 1 development in the 1990s and introduced the improved WS - 1B in the late 1990s . The WS - 1B mainly targeted foreign customers and was actively marketed by Beijing - based China National Precision Machinery Corporation ( CPMIEC ) . Compared to the WS - 1 , the WS - 1B features an increased range of 180 km . A WS - 1B rocket battalion is equipped with : WS - 1E . The WS - 1E is the 122mm multiple rocket system developed by SCAIC as a successor to the PLA ’ s current Type 81 122mm rocket system . It is similar to the Type 90 122mm rocket system and did not enter production . A WS - 1E rocket battalion is equipped with : WS - 2 . During the 2004 Zhuhai Air Show , SCAIC revealed its latest WS - 2 multiple launch rocket system . The weapon is fitted with 6 box - shape launchers and fires 400mm rockets to a maximum range of 200 km , however some sources claim that it might be up to 350 km . This enables the PLA to strike the west coast of Taiwan , including the capital Taipei . It is speculated that WS - 2 is going to be a cheaper alternative to the expensive short range ballistic missiles in Chinese inventory . The WS - 2 is fitted with a primitive cascade inertial terminal guidance to compensate for the degraded accuracy caused by the long distance flight of the rocket . In 2008 , it was revealed that sub - munitions are developed for WS - 2 , including a specialized anti - radar version , which is a rocket containing three UAVs . Once the rocket is fired to the target area , the UAVs are released the same way like other sub - munitions . The seekers would seek out target radar signals as UAVs began to cruise , and once locked on to the radar , UAV would home in and attack . Some domestic Chinese military enthusiasts have claimed such technology was based on the principle of Israeli Harpy anti - radar UAVs , but this could not be confirmed by independent sources outside China . A WS - 1E and WS - 2 rocket battalion shared the same equipment and is armed with : WS - 2B . Upgraded version with 200 km range . WS - 2C . Upgraded version with GPS guidance and 350 km range . WS - 2D . Upgraded version with GPS guidance and 400 km range and ability to launch lethal unmanned aerial vehicles . WS - 3 . Built by a competing factory , the WS - 3 has primitive cascade inertial terminal guidance and has a range of 300 km . WS - 3A . Upgraded version of WS - 3 with primitive cascade inertial terminal guidance updated by civilian GPS / GLONASS , but can be upgrade to military GPS / GLONASS upon customer ' s request . WS - 6 . Lighter version of unguided 122 mm PR50 MLS , with number of tubes reduced by 60 % to 40 from the original 100 of PR50 MLS . This is a more compact version of PR50 with reduction of weight for rapid deployment . WS - 15 . WS - 15 MRL is a shorter range version with 40 km range , equipped with primitive cascade inertial terminal guidance . WS - 22 . WS - 22 is a guided version of 122 mm PR50 MLS with primitive cascade inertial terminal guidance , with standard range of 20 to 30 km . WS - 32 . 400 mm MRL of 150 km range with civilian GPS / GLONASS satellite guidance update , but can be upgrade to military GPS / GLONASS upon customer ' s request . WS - 33 . 400 mm MRL of 70 km range with civilian GPS / GLONASS satellite guidance update , but can be upgrade to military GPS / GLONASS upon customer ' s request . WS - 35 . Development of WS - 1 series of 150 km range with civilian GPS / GLONASS satellite guidance update , but can be upgrade to military GPS / GLONASS upon customer ' s request . A100 . Development of WS - 1 series with primitive cascade inertial terminal guidance . Using standard munitions , the range is 40 – 80 km , and when using extended range rounds , the range is increased to 60 – 120 km . The 10 - tube launchers contained 2 5 - round launching boxes arranged in 2 rows , 2 on top , and 3 at the bottom . A200 . Development of A100 with primitive cascade inertial terminal guidance updated by GPS . The arrangement of A200 is different than A100 in that each launching box consists of three rows of launching tubes , three on the top and bottom respectively , and two in the middle . A200 rockets also have additional forward control surfaces that were not present on A100 rockets . SR - 5 . SR - 5 MRL is a self - propelled MLS which first made its public debut in 2012 Eurosatory . SR - 5 is a fully computerized and digitized system with modular design concept to enable both the 122 mm rocket series and 300 mm rocket series to be adopted on a single chassis , using the same fire control and support systems , hence greatly reduces the operational cost . SY300 . SY300 is a development of WS - 2 / 3 , with SY standing for Shen Ying ( 神鹰 meaning Deity Eagle ) , designed after the 4th Academy and the 9th Academy of China Aerospace Science and Technology Corporation ( CASC ) were merged to form a new 4th Academy . The main difference between the SY300 and its WS - 2 / 3 predecessor is that for WS - 2 / 3 , the control section of the forward control surfaces and the warhead are integrated into a single unit , but they are separated in SY300 . This design difference enables the guidance system of SY300 to be rapidly changed in the field by soldiers , by simply replacing a the guidance system with a dummy weight , when SY300 needs to be used as an unguided rocket . Each vehicle can carry either six or twelve SY300 rockets . SY400 . SY400 is a further development of SY300 , with a typical range of 400 km . As a low cost alternative to ballistic missiles , the accuracy of SY400 is increased by adding GPS to correct the cascade inertial navigational guidance , and according to the developer , the accuracy can be further improved if military grade GPS signals are used to replacing the existing civilian GPS signal . Another feature of SY400 is that it shares the same launching vehicle and fire control system of BP - 12A ballistic missile , thus simplifying logistics . Armament . The free rocket used by the WS - 1 and WS - 1B consists of the warhead and fuse , an FG - 42 / 43 rocket motor and the tail section . The FG - 42 / 43 rocket motor is a single chamber , solid rocket motor with an advanced hydroxy - terminated polybutadine ( HTPB ) composition rocket propellant . The rocket of the WS - 2 system features four control surfaces in the middle section of the rocket for terminal guidance . The rocket can be fitted with various types of warheads including anti - armour / personnel submunition , blasting , fuel air explosive ( FAE ) , and high - explosive ( HE ) . The ZDB - 2 blasting warhead is loaded with steel balls and prefabricated fragments . The SZB - 1 submunition warhead is designed to destroy large area targets such as armour formation and infantry troops . When the SZB - 1 submunition warhead detonates , around 500 bullets are expelled under high pressure . Launch truck . The launch truck is available in a number of variants . The MF - 4 launch truck is based on a Chinese indigenous 6X6 truck chassis . The HF - 4 launch truck is based on the more capable Tiema XC2200 6X6 truck . The WS - 2 uses a heavier 8X8 Taian TAS - 5380 truck chassis . The launch tubes have an elevation range of 0° to 60° and azimuth range of - 30° to + 30° . The truck is equipped with four hydraulically operated stabilisers which are lowered in preparation for the rocket launch .