e400b

The Weishi (WS; Chinese: 卫士; lit.: 'Guardian') family of multiple rocket launcher systems were mainly developed by Sichuan Aerospace Industry Corporation (SCAIC, also known as Base 062) in Chengdu, China. The systems include the 302 mm WS-1 (100 km range), the improved 302 mm WS-1B (180 km range), the 122 mm WS-1E (40 km), the 400 mm 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 launchers (MRL) other than the primary developer SCAIC.
China Aerospace Long-March International ALIT (CASC) has published a table showing the ranges of most of the WS rockets. There are unguided, guided and precision guided rockets.

View More On Wikipedia.org