But they didn't do anything with the J-10 last year at the Zhuhai show. If they are actively trying to export the J-10, they should do a better job advertising it.
Exporting the J-10 to Pakistan? Is it official or just fanboy stuff? The only thing concrete is the JF-17. I have not seen anything official or even remotely suggestive of China's intention to export the J-10 to anybody.
And China has never exported anything that they themselves deploy in large quantity, especially when that equipment is still new and is still the pride of China's fighter development industry. They worked so hard and so long to develop the J-10 not too long ago and it is clear they intend to use the J-10 as their mainstay fighter for a long time to come. And they still have so many old planes that they need to replace. And they are still developing new tactics and doctrines for the J-10 themselves. I don't think they want to export it at all. It just does not make sense.
That's because J-10 is not a export focused project, so you don't want to just list all of its numbers. But if they are bringing it to Zhuhai airshow, flying it around and then having it displayed on the ground with all of the weapons it supports, then it's available to friendly countries.
The export to Pakistan was widely reported. It only hasn't gone through yet due to Pakistan's finance issues. At this point, they are not aggressively trying to sell it like they have been with JF-17, but they will do it to friendly nations for political purposes. Especially with J-20 project proceeding well at this point and J-10B entering service, there is no reason that some variant based on J-10A with some upgraded technologies cannot be offered.
They are offering a variant of Yuan submarine while they are still inducting it. They were offering a variant of 054A to Thailand a year ago.