The QW-2 (NATO reporting name: CH-SA-8)[3] is a Chinese man-portable infrared homing surface-to-air missile (SAM) MANPADS.

[4] The Qian Wei-2 (or Vanguard 2, in its export designation) is the third generation of man-portable missiles built by the Shenyang firm Hangtian Xinle Ltd.

It is also equipped with a new dual-band passive infrared seeker, providing good resistance to thermal decoys (flares) and parasitic heat sources from the terrain (sun, ground, etc.

Once the target is acquired on radar, guidance returns to the optronic system, which is responsible for tracking and engagement.

The fire control is mounted in a ball, which includes a thermal camera and a laser rangefinder.