Zhu took the tests and get admitted, like the rest of his peers(Jiang, Hu, Wen, Li,etc) they're all true graduates from the best universities in China then, which explains why China made leaps and bounds under their leadership.

Xi is the only exception among them. Xi got in college without _any_ tests, purely because he has a powerful father then. It's said he could not understand a thing taught and there is no way he could graduate(or admitted). Indeed it's unimaginable for a 6th grader to take calculus in the top universities all of a sudden.

Xi even said he has a PhD degree, it's so laughable he had to remove that claim himself.