China is not a global superpower. At most they are a regional pseudo-hegemony - they attempt to bully neighbors by appearing to be a formidable threat. Sorry, parading 1950s equipment (complete with ghetto 4" whitewall tires) through peking on May day does not make China anything more than a thuggish looking creep.
Even without US intervention, China would not be able to take Taiwan in a year of continuous action.
Sure they have 28 J20 fighters, but they lack any real industrial capability to run a full time continuous production to produce more. The rest of their air power is either very limited in number, or obsolete junk - and - they lack the capability to maintain ANY of this equipment on a full time "operational" combat basis. The air power we have "mothballed" in our desert SW alone could be mobilized quicker into a superior force.
They would have 30 J20s, but they destroyed 2 while attempting to "shoehorn" the J20 into carrier operations - on - their single aircraft carrier, which was a partially built, obsolete diesel electric soviet model abandoned in 1986, and bought by some Macau investors with the intent of making it a floating casino (funny story, look it up).
None of their submarines have "silent running" capabilities, which means we can hear a Chinese sailor flush a deuce as soon as they leave the dock. We can take them ALL out before they would even get near international waters.
We stopped building F22s because frankly we didn't need anymore. We're running continuous production of F35s at a rate that no other country can begin to match (yes, our friends are 'in' on the F35 effort). Despite all the "whining" about how the F35 hasn't achieved all of it's intended "on paper" capability, experienced F16 pilots who trained in F35s told all the pin headed whiners to shut up. The F22 and F35 represent more than just a "number of aircraft" bean counter measurement - they represent a strategic military/industrial/technology "trajectory" that no other power, especially China, can match.
The USA has 11 nuclear powered Super Carriers, and about the same number of "jump" carriers, with more being constructed.
At best, China's military is only useful for intimidating its own people into submission. China has a large number of military personnel, but they lack the infrastructure to even feed them if they were on active duty. China's has a large number of obsolete tanks, but their only purpose is to drive over their own people if/when they rise up.