"Q" Talon strike
This is the best power, it improves a lot your basic damage and in the 3 hit you pull him up

"w" battle cry
Pasive: 15%/20%/25%/30%/35%
Active: it double the pasive abilitie

"e" audacious charge
Xin charges an enemy dealing damage and slowing it and all the enemies in the area

"r" Crescent sweep
Xin zhao sweeps his spear around him, dealing damage to nearby enemies based on there current health.

I usually atack an enemy using the following combo: q w e r and q/e when ever you can. why q first? because you can throu your enemy into the air sooner.

Farming is very important at the begining. Use the charge to kill the minions but dont waste too much mana.

At the beginning you should play very offensive, even to the range enemys. Wen you are in lv 2 you are more than capeble to start to win the lane. I recomend you to go with a tank, like sion or galio someone with stun or taunt

Xin is very good in the team fights but is very easy to get killed, you should stay low, let the tanks go first. Use all your powers and go back (depending on the situation)

DON T PLAY AGAINST VAINE OR CORKI SPECIALY VAYNE