indians when tried this tactic were not able to pick up that anything like FC-20 exists or will ever exist , they thought J-10 to be inferior to western aircrafts so it wouldn't have made any difference to them at that time if PAF goes for J-10 , their main aim was to block all sales around the world without having even a bit of thought or imagination about china been coming so far with so many things in a small period of time .
And honestly they would have afford to hold on , coz they already had mki's in great numbers around 275 which they feel proud of , while their mirages and mig-29's were also good and updated platforms where as PAF apart from few old f-16's that too not BVR capable had nothing to show off (atleast on paper) when it all started but now the quick deliveries of jf-17 and rumors about FC-20 would atleast have given them a chill in the spine but still i don't think their situation is that much crippling when we compare them with PAF
But in case of China the situation takes a turn around , just for trapping PAF they forgot that there is also a military beast around them named China which is modernizing heavily and the gap is increasing like anything, Their strategy fired back on them and now after every few months later you see reports by their military or defence officials showing their desperation and speak tons for the frustration they are having.
With the modernization of China i don't think india is going to hold for so long, sooner you will see them deciding on what they want .
They tried to engulf PAF with their strategy but their strategy made them to be engulfed by PLAAF