I think China's overall Air force should be expanded significantly to atleast 3000 fighters + 400 bombers. This is necessary to attain complete dominance over western pacific with both US and its ally plane+air defence numbers accounted for.
China used to have a very large air force at 3000+ fighters. But for the last 20 years they have reduced it down to current 2000 fighter range. There is no reason to keep at that level.
China is in the heartland of Asia. just with Air force alone China can project power all over Asia including even the Middle East, South Asia, Malacca Straits and even the Black Sea. All within Range of Chinese long range bombers and long range fighters.
This is an advantage China has that US does not which is to be in the heart of Asia. China should utilize this advantage to the fullest.
So, instead of retiring planes like the J-10A, the better approach should be keep them in lower echelon forces and actually bring online new Air brigades or revive older ones.
China's land borders are essentially secure today. By 2030, I would expect even the Indian Air Force should be wiped out, given how far they continue to fall further behind.
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On China's coastal borders, it is credible to operate tanker aircraft over the water and conduct very distant missions with non-stealthy aircraft
But over China's land borders, I highly doubt they will operate tanker aircraft with huge RCS over hostile landmasses which can hide SAM systems. Ideally you want to only operate stealthy aircraft over hostile landmasses, which means no 4th gen aircraft like the J-10A