I'm not sure China would be willing to risk ToT on a 5th gen fighter with Pakistan until some time after the technology has been in operational use. If it ends up being a well designed fighter they might even be a bit paranoid about selling it to Pakistan.
I'm not even sure China is capable of producing a F-22 class fighter yet.
And while Russia is working on a PAK-FA derivative with India, I strongly doubt that is due to any real strength in India's aerospace industry - rather it's aimed at maintaining a strong grip on the India arms market which is increasingly becoming crucial for Russia as China has greatly reduced its import of expensive Russian systems. On top of that, India's financial contribution will go a long ways to paying for what Russia ultimately needs to develop anyways - a competitor for the F-22 class fighter.
I'm not even sure China is capable of producing a F-22 class fighter yet.
And while Russia is working on a PAK-FA derivative with India, I strongly doubt that is due to any real strength in India's aerospace industry - rather it's aimed at maintaining a strong grip on the India arms market which is increasingly becoming crucial for Russia as China has greatly reduced its import of expensive Russian systems. On top of that, India's financial contribution will go a long ways to paying for what Russia ultimately needs to develop anyways - a competitor for the F-22 class fighter.