The Kung Feng IV began development in 1960 and was completed in 1975, and were placed atop M113 armored vehicles. Towed and self-propelled variants of the Kung Feng IV entered service in 1972 and 1976 respectively; the towed variants were initially attached to the chemical weapons artillery division.
Because the Kung Feng IV launchers were comparatively small, they were modified to be placed atop various different vehicles, such as the M151 jeep and LVTP5-RL. By the year 2000, only the LVTP5-RL variants of the marine corps were in service.
During the 1970s, the earlier developmental models of the Kung Feng VI rocket launchers only had a range of 10 kilometres, which made them less effective than the older Kung Feng IV launchers. Unsatisfied with the range of the launchers being inferior to that of those from other countries, chief of staff of the artillery forces Hau Pei-tsun requested that the Academia Sinica research and development division increase the range of the rockets to 22 kilometres, and develop designs that allow for the implementation of cluster bombs and airburst fuses. This development led to the B-type rockets which were completed but never entered service. As other countries further continued to improve their rocket systems, with post-Cold War 122mm rocket models pushing beyond ranges of 20 kilometres, the weapons development of the ROC armed forces gradually fell behind.
Within the development process, the Kung Feng VI was initially planned to be placed on top of an M42 Duster chassis, however due to difficulties in procurement the M113 chassis was used instead, which was unable to properly bear the weight of the rocket system. Henceforth, the ROC army gave up on the prospects of implementing the Kung Feng VI on caterpillar tracks, and began working on placing them on M809 five tonne wheeled trucks, in addition to implementing the FAC-202R fire control apparatus in order to improve precision.
The ROC armed forces quickly retired its Kung Feng IV launchers and replaced them with the newer VI model as it entered service, however at the same time the launchers were incapable of fast reloading and had no dedicated transport trailer. Upon firing, it took soldiers 15 minutes to manually load the next rockets before the Kung Feng VI could fire again. Because the Kung Feng VI had logistical requirements greater than that of non-traditional artillery units, not many units were manufactured.
As of present the Kung Feng VI is still in service, however there are plans for the units to be mass-replaced by the Thunderbolt-2000 systems.