The PL-11/Aspide is a semi-active, solid fuel radar-homing medium-range/BVR air-to-air missile (MRAAM) and laser/microwave proximity fusing.  The missile uses a mono-pulse semi-active radar-homing seeker copied from the seeker of the Italian Alenia Aspide missile.

Source: http://www.sinodefence.com/airforce/weapon/pl11.asp; http://en.wikipedia.org/wiki/PL-12







