Never ever !... and even then it will take years.
Neither SAC or CAC was able to manufacture more than 40 planes per year, CAC with the smaller J-10 probably a few more but not even close to Your number and both the J-10 and J-11 are much less sophisticated ones.
For the J-20 they are right now at what rate ?? ... maybe 2 per months and given the confirmed birds even less.
So close to 100 per year is impossible and most likely not even desirable.
I did say that the year would be around 2025. China will have an economy maybe twice as large by then and so will have so much more money to spend. Yes the J-20 will come in more expensive than J-10, J-11 etc but I am considering that only 1 5th generation fighter is in production then. If there are more then no need to build 100 or so J-20s a year.
We need to remember that once China finally designs a product it likes it builds them in quantity. Look at the examples of the Type-054A frigate, Type-052D destroyer and the new Type-55 cruiser..
We cannot take examples from the past of J-10s/J-11s as China was and is much poorer now than it will be by the mid 2020s. It also made little sense for China to build thousands of 4th generation fighters knowing that they will become obsolette in only a decade after being put into service.
Unless there is another 5th generation fighter in production by the mid-2020s then 100 or so J-20s will be rolling off the production lines every year. Whatever happens, unless the US restarts F-22 production China will have the most powerful air-force in the world by 2030.