So it all comes down to this. You're finally in The Sanctuary. You’ve made it this far and there’s only one fight left in Sifu. The fight against Yang is unequivocally the toughest in the game, due in part because you can’t utilize many of the strategies you might have relied on with other bosses. Despite this, Yang can be defeated--you’ll just need to approach the battle with the utmost patience. Here’s how to defeat the final boss of Sifu known as Yang The Leader, who waits for you at The Sanctuary.
There are a few things to be aware of before engaging with Yang. First, you cannot use Focus attacks on this boss, so it’s best to spend your precious rewards elsewhere. Secondly, we highly recommend coming to the fight with a staff or other weapon. With previous fights, you were encouraged to skip using weapons, but that’s not the case against Yang. You certainly can get through the fight with your bare hands, but you’ll have a much harder time.
Your main goal when battling Yang is to block and avoid attacks. Remember, to avoid attacks, hold L1 and move the left stick away. For instance, if Yang punches directly in front of him, hold L1 and move the left stick left or right. Avoiding is effective because it allows you to stay in place and follow up with a move of your own without impacting your Structure meter. In fact, a successful avoid actually causes your Structure meter to go down, which is ideal.
Begin the fight by approaching Yang and waiting for him to attack. Make sure you block his strikes so you can increase his structure meter. Mix in a few dodges here and there to help recover Structure, and do not attack him unless you’ve blocked a flurry of strikes first.
You may have to block six or seven of Yang’s moves
Read more on gamespot.com