Congratulations! You'd need all those J-20s & more when you launch your campaign to take Taiwan .
Why, you ask?
It's like this - all your WS series of TFs are based on the AL-31 F series with India mfg the AL-31 FP version & the AL-31 F powering the Su-27 version & the J-11 with the WS-10 now powering your J-11s derived as I mentioned earlier from the AL-31 F.
Coming to the J-20s , the initial power plants were the AL-31 FM2 from which the WS-10 C is derived which is now powering your latest & up coming batches of J-20 FA.
Now for the real meat of the story . The average MTBF - Mean Time Between Flights for a Su-30 MKI is 5-6 hrs for every hour of flight. By & large this MTBF holds true for all the FAs powered by variants of the AL-31 F series of TFs & MOST IMPORTANTLY for all its derivatives too like the entire WS series but especially the WS-10 C powering the J-20s, since that's the topic of our discussion.
This means for a sortie lasting 8 hrs the MTBF will be 40-48 hrs but there's a twist here - 5th Gen FAs have a longer MTBF as compared < 5th Gen FAs because STEALTH is maintenance intensive.
What will be the exact time required for a turn around of such a FA as far as the J-20s go is anyone's guess.
The F-35 is targeting a MTBF of 5 hrs. However, the present MTBF remains a closely guarded secret. Now, if the US is facing such huge problems with their already problematic F-35s which by any yard stick is a troubled program, I doubt anyone here including gotipua will trust the J-20 to better the MTBF of the F-35.
That's one of the key reasons why the US is building the F-35 in its thousands not the run of the mill explanations they pass on to whoever is willing to hear them that the numbers are to cater for the total replacements of the F-15, F-16 & F-18 from their inventories. Incidentally, aren't newer FAs supposed to be fewer as compared to the older ones they replace because of enhanced capabilities?
Hence my dear wumao, if the US fields 2000 F-35s by 2030 you'd require 3x that number just to keep up leave aside gaining an advantage.
And I haven't even got into the stealth aspects of the J-20 in comparison to the F-35 with it's Avionics, DAS, ACT, weapons package etc which is another story altogether, albeit a very brief one which you wouldn't want to read at all.
Now run along to the MSS & get something better for us to chew on.