Gao Yang's one arm was not very convenient, but that did not affect his enthusiasm to learn how to use anti-aircraft missiles. He had someone help him place the missile on his right shoulder and, using only his right hand to control the missile launcher, he managed to get a rough feel of how a missile is fired.
Nate was right, the operation of anti-aircraft missiles really was idiot-proof. You could learn it just by trying it once.
An anti-aircraft missile is a piece of technology, and whether it can hit the target after being fired is up to the technological level of the missile, but the shooter's timing also plays a crucial role.
With advanced anti-aircraft missiles, all you need to do is aim at the target and fire, and leave the rest to the missile. For SAM-7s, however, you need to create as favorable a launch environment as possible before firing.