The chinese absorbed both the mongols and the manchus, the latter even more so. You can easily call that a cultural victory.
With the chinese, there hasn't even been nationalism like in the west, but rather culturalism. The imperial Chinese depicted China as being the world, with just barbarians around.
Until the westerners arrived. The self-strenghtening movement and the Boxer rebellion were some of the first cases of chinese nationalism, and that was just like 150 years ago, little more than 100 in the case of the Boxer Rebellion. I think China is quite a good example for cultural victory. You get conquered and the conquerors take your culture. The Qing were even one of the greatest dynasties, despite not being of Han origin.
Of course in the end they lost, but there are other reasons for that.