Leishi is a type of guidance kit that can modify existing unguided bomb into guided standoff munition.

These maneuverable guided bombs are similar in roles to the American Joint Direct Attack Munition (JDAM) kit but with longer ranges.

Factory 624, later known as the Harbin Jiancheng Group, a subsidiary of Norinco, began the development process in 1974, with prototypes completed in 1980.

[15][16] LS kit is a strap-on upgrade package to provide general-purpose bomb with range extension and precision strike capabilities.

[18] A miniaturized turbojet kit can be mounted at the aft end, boosting LS-6's range to 300 km (190 mi; 160 nmi).