They key are the engines. Once the WS-19 engines reach a level of maturity and reliability, building the platform is relatively easier for Chinese industry these days. Also, as China ramps up production of the J-20 and possibly J-35, the per unit cost of components will drop, which is where a purchase/investment for co-production would make the most sense. Pakistan has to focus nowadays ok maximizing the JF-17 as the design evolves, while at the same time the J-35 develops with PLANAF funding. Then, the PAF will probably make a purchase (after it has reached the limit of what it can do with the JF-17) when the J-35 design is deemed mature, similar to PAF probably purchasing the J-10CE, now that the design is seen as mature enough.NO NO NO
Pakistan can't afford the project alone. It is much much more expensive than the project of JF-17/FC-1.
And IMO, the development model like JF-17/FC-1 is impossible in the future.