I personally think China should devote more resources into training its pilots than only focusing on its equipment. The only difference between the Israeli air force and that of the middle east is the quality in their pilots. When Israel was in war with those Arab nations, they did have superior weapons, but those F-16s were not advanced enough to have complete dominance over the Arabs if it wasn't for the eliteness of their pilots. The same applies to the Eritrean–Ethiopian War. The only times when planes were shot down was when Russian mercenary pilots were piloting the fighters.
From the news I have read and watched on the PLAAF, all the training assignments were extremely simple. All they had were flying long distance between airports and shooting down low speed drones. Even the "more challenging" assignments were still just flying without radars on within regions filled with electronic countermeasures and flying in bad weather. I barely ever seen them conducting training missions similar to the Red Flag and Top Gun, where pilots actually practice realistic air battles, not mentioning dog fights. We even barely see them performing exotic manoeuvres other than those in airshows.
If the pilots are not well trained, then doesn't matter how good the equipment are, they still will end up like what happened in the Eritrean–Ethiopian War.