Of course, if Pakistan were to fully fund the project and commission the 611 Institute to design a new 5th-generation stealth fighter, essentially purchasing the design plan outright, I believe the 611 Institute would be very happy to undertake this project. However, given Pakistan's current situation, it is impossible for them to independently support a new 5th-generation stealth fighter project.
The days of Pakistan "commissioning" and "funding" aircraft development teams in China are over. PAF learnt the
hard way with the JF17 programme, that it is not the way to go. Pakistan learnt its lesson about collaborative projects with China from that episode that left a bad taste in PAFs mouths.
That is the reason why Pakistan refused to adopt the FC-31 when it was marketed so so aggressively to them as the "lead" customer. Pakistan was not interested in funding design teams in China anymore to design and build the FC-31, while not getting any of the intellectual property for itself and being forced to operate the platform as a sole customer while waiting for export orders to come in. It would much rather spend that money on projects in Pakistan, or purchase capability off the shelf directly from China.
So, Pakistan rebuffed all FC-31 pitches, and
waited for China to pickup the FC-31 project, and make the J-35 project out of it on its own cost. Pakistan forced China's hand on that one as it did not want to get involved in a repeat of the FC-1 project again. So, the money Pakistan saved on not having to fund another aircraft development project for China's industry, it can use on procurements of actual military capability instead which is better for Pakistan.
China was meant to purchase an equal number of FC-1s as Pakistan was to, under the terms of the original agreement with China. China backed out of that agreement, and effectively forced Pakistan to fund the entire project to bring the JF17 to front line service. That development cost has come at the cost of not being able to purchase as many JF17 as it wanted to, as it spent so much on getting to JF17 platform developed. That is why it still has so many F7PGs and Mirages left, it ran out of money because it hand to fund the project alone effectively.
Some of us here are old enough to know about and remember the history of the Super7/FC1 at the beginning of the project and how both were meant to purchase equal numbers. China may have had good reasons to back out based on operational needs, but it set a precedent that PAF won't forget about for a while..
Pakistan has learnt its lesson from China's business antics and will be alot more careful about how it approaches projects in the future.