Any Specs on the planned WS-19 engine? Presumably it would be a supercruising engine that could fit the JF-17.
Also, The Chinese purportedly lag behind in sensor fusion (according to this article, but they are probably catching up behind the scenes). Any chance Pakistan can seek that capability from our other suppliers. Sweden maybe one source, but Turkey maybe able to help develop something like that for the JF-17 (They are working with Saab on the TFX, Saab is great at Sensor Fusion), and the experience with the Turkish upgraded JF-17s could give hints to the Chinese companies on how to catch up there as well.
The biggest problem of FC-31 is its positioning in the market. Sensor fusion with narrow, directional data links are already off-the-shelf products in China for quite a few years. J-20 has them all. The prerequisite and the starting point of sensor fusion is an AESA radar. There is no need to implement sensor fusion if you don't have an AESA radar.