One scenario is Pakistan will print PKR and then buy Yuan and then return the China-specific loan instalment in Yuan which they have borrowed on high-interest rate compare to what is available in the market and compromised skill development as Chinese are employed in large numbers.
China will never agree to it, because for them PKR is worthless, even more so if
Shitistan prints more of it. Even if they agree to sell Yuan to
Napakis, they'll end up with a pile of worthless paper that cannot be used anywhere in the world and since
Shitistan has little to export to
Cheenis, they cannot use this pile of worthless PKR to buy anything useful.
This is why CPEC deals and payments are all drafted in dollar terms, I believe. Chinese want hard currency in return for their "investment".
This is one big reason for IMF being reluctant to lend money to
Napakis without pouring over CPEC repayment agreements first. The dollars they inject into Pakistan, will instantly find their way into
Cheeni hands.
China will earn money in exchange and in the interest of the loan amount. Pakistan will end up having an infrastructure which will generate revenue (in theory).
The "revenue" will be used for upkeep and maintenance, all of which, will be conveniently handed out to Chinese companies under the terms of "guaranteed returns".
CPEC is the best thing ever to happen to
Shitistan, it should be taken to its logical conclusion.