I'm seconding Sean on this. China has some competent bureaucrats, but they are not party members. Government finances for examples are ran by a lot of professional economists without party background in their majority. There, the party is simply too afraid to entrust this to its inept members. High finance for them is like a piece of old, but mission critical C++ spaghetti code from winnt days which with a sticker "don't touch, will explode on you."
It was in Jiang's times when things turned "position in the party !== automatic position in the government." Jiang was waaay to afraid of party members. He saw the party as a dual structure:
1. An assembly of oafs, and loosers
2. Along with a hornet's nest of Maoists, Hua-ists, Deng-ists, and 20 other "ists," all of whom were a threat to his rule.
So he simply decided to recruit technocrats from aside. All kinds of good boy Harvard graduates were perfect for that role, for them being politically insulated from the rest of Chinese politics. And as an added benefit, they can actually run the government more or less well.
What the CPP is today? In its majority, the same thing it was in Jiang's times, except Jiang is not the top dog anymore, and an average age went up even more.
What things can change? The party is getting older, and few young cadres they have come from communist families. Those amount to around a half of new members of twenties age cohort. The other half are just people for whom the party member card is nothing more than a way to get free rides on public transport, along with a very very very remote hope that this will get them to a position of prominence.
Xi came to power in large thanks to that cohort of party members who thought of themselves being marginalized, and thrown away to dustbin of history. His political platform inside the CCP was pretty much like "Make the party membership great again." But you guys probably know, every communist is very good at reneging at his promises, and Xi is not an exception. Aside for few symbolic nods, I don't think he will run the country in a manner much different from how things were in Jiang's era.
He himself is afraid of the colossus which is the CCP, for him it is also a dark lake full of his own set of "-ists" and, worse for him, people who are genuine reformers. He is much favoring the party becoming a seat of few gerantocrats who will be dying one after another.
BTW, the two dudes who voted against Xi on the last congress were Jiang and Hu.