BAF should sell F-7BGI to PAF and get JF-17!
That's because, PAF cannot replace all its old fighters with JF-17 alone since it will take many years. The rate of production will not match the rate of decommissioning(because of cost of a single user based production line) and there will be gaps in the fighter fleet force. So PAF will go for stop gap aircraft. If BAF agrees to sell the F-7BGI, BAF can rectify the mistake it made, and PAF can get a stop gap in a single deal! Plus a second JF-17 line can be opened in China as well and even PAF can get benefit out of that. JF-17 will get a solid order which will spurn even further orders. For the BAF, the cost of the F-7BGI can be subtracted from the JF-17 procurement cost.
It looks like a win win deal for both our brotherly countries.