It's a very Chinese story cause of the element of the heavens in it. It's pretty much Chinese heaven, including the weird inclusion of Buddha

But if anyone doesn't know, wukong goes up to serve the jade emperor which is distinctively a Chinese belief and serve as horse guard. He also steals the empress peaches which again is another Chinese element and iirc the reason for his immortality as the peaches are for the celestial. He also fights er lang shen a Chinese deity