Alpha Strike

This move is, on its own, probably OP, and a good reason why an AP Master Yi is viable
Annoyingly hard to dodge if used well

alpha strike is a very good ability it transport u to the target and u make damage, also u do damage to many units.

This is the key skill to master when using Master Yi. He is relatively easy to play, but using this skill is what separates the Wuju masters from the rest. Try to find out how the other champs react when you target them, as everyone reacts differently. Try to watch out for ones that see you targeting them and run straight in to their team making you an easy kill/target for stuns.
Combining this skill with Alpha Strike, targeting a champ and double-hitting them, is a superb way of harassing, but for those casters/ranged with heavy damage its not always easy doing it this way without taking too much damage yourself. In fact these heroes makes your life pretty hard as you are squishy, and it might be risky just to land on their mobs. If this is the chase, try targeting mobs JUST before they die, as if they die while you are in Alpha Strike you will not land on the dead mob, but on the spot from where you cast Alpha Strike!
Mid/late-game you also want to not cast it instantly, but try to cast it JUST as the other players use skills for getting away, like Rocket Jump, Tryndas spin, or even flash. Master this and you will be an unbeatable chaser.
Last if you got a summoner spell slot you dont know what to use for, you can combine Alpha Strike with Clearvoiance to use it as an escaping-tool in jungle, lizard and golem are great gateways for escape as your speed does the rest.

Bug on it. Freeze for 5sec if the enemy dies or get out of sight range or flash.