'worker bee') MLR series is a family of multiple rocket launcher systems used by the Republic of China (Taiwan).

Of these weapon systems, the latest variant is the Kung Feng VI, which commenced development in 1975, and was formally revealed to the public during the Taiwan National Day Parade in 1981.

The Kung Feng VI resembles the Soviet BM-21 Grad, albeit with a smaller diameter size and greater number of launcher tubes.

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.

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.