The greatest difference here is China's UAVs. Russia has little to no proper drones. China has on the other hand has hundreds of MALE/HALE drones. Just look at how fast the GJ-2s were delivered to importing countries despite their multi-dozen order sizes. These drones have 30+ hour endurance and fly higher than the ceilings of MANPADS. There will be losses. But China will not be doing dumb bomb and rocket runs at low altitude in contested air space. I am baffled by Russia's decision to do so. Probably because of economic reasons.Mainland's military power superiority over Taiwan is much greater than Russia's military superiority over Ukraine, considering the type of war they will be fighting. Russia has a lack of material military resources as well as manpower, against Ukraine which is the largest country in Europe, other than Russia.
1. Ukraine is about 17 times the size of Taiwan. Taiwan is about 0.36% the size of Mainland, Ukraine is about 3.5% of Russia.
2. Ukraine's population is nearly 30% that of Russia. Taiwan is about 1.6% of Mainland Population.
3. Ukraine GDP is about 10% that of Russia GDP. Taiwan is about only 3.7% of mainland GDP.
In an air war, China and Russia will both gain air superiority, because their air forces are both much stronger than the opponent. However, the amount of PGM's and missiles in China's arsenal is MUCH MUCH larger than Russia as a result of China's much larger budget. But in terms of their opponents, Taiwan's size is much much smaller than Ukraine, which means that even with same intensity, the PLA will be able to drop at least 1 to 2 orders of magnitude more munitions on Taiwan per unit area, and with a much larger percentage of these will be PGMs compare to Russia.
This is not even counting in the fact that with J-16D and a whole lot of other specialized electromagnetic warfare equipment the PLA put into active service, PLA will be a lot more effective in suppressing and destroying air defense capabilities on Taiwan than Russia could do in Ukraine. Of all the aspects in which the Ukrainian was able to resist Russians to a certain degree, pretty much all of these are weaknesses that Russia has but China does not.
Javelins are a real threat. Eliminating them by purely air campaign is unrealistic. MAWS, DIRCM and APS will be a must. Smoke laying capabilities by the artillery and aircraft are also needs to be improved.