SY-300 is a development of WS-2/3, with SY standing for Shen Ying (神鹰 meaning Divine Eagle), designed after the 4th Academy and the 9th Academy of 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 SY-300. This design difference enables the guidance system of SY300 to be rapidly changed in the field by soldiers, by simply replacing the guidance system with a dummy weight, when SY-300 needs to be used as an unguided rocket. Each vehicle can carry either six or twelve SY300 rockets.
