Xin Zhao is a great initiator to combat. Lead the front to start a fight and use your ultimate to do the most damage possible.
Try to position yourself so your ultimate's knockback is most effective.
Xin Zhao is a powerful initiator with both his charge and ultimate dealing damage to all units around him. Try having your team stay spread out until he's used his ultimate.
Xin Zhao relies heavily on his Three Talon Strikes for damage and cooldown resets, so preventing him from finishing his combo will have a dramatic effect.