I never quite got why the WP-14 Kunlun exists at all. China had the license to build the Rolls-Royce Spey aka WS-9 back then. So why did they not just build a combat jet with two of those engines instead? Not that it matters anymore given combat jets with the WS-10 now exist.
I have heard some people say online that China already got all it needed out of their purchase of Motor Sich including. All schematics and key personnel. That all the nationalization of Motor Sich will achieve is the termination of all their engine sales to China. If this is true then Ukraine certainly shot itself in the foot. We might simply see the Al-222 produced in China.
Just in short even if off-topic: Since the WS-9 did not fit the J-8 and since they wanted a more modern engine that could fit the slimmer fuselage they needed an engine within the same dimensions of the WP-13.