I remember reading somewhere that delta wings are good for quick and efficient lift, provide greater fuel storage, and perform best at high speeds and high altitudes.
If I allow myself to armchair general for a little, this makes sense for a country focusing on its defense. The threat of US stealth bombers and fighters mean China probably values fighters that can quickly get to their desired altitude to intercept.
I remember reading somewhere that delta wings are good for quick and efficient lift, provide greater fuel storage, and perform best at high speeds and high altitudes. If I allow myself to armchair general for a little, this makes sense for a country focusing on its defense. The threat of US stealth bombers and fighters mean China probably values fighters that can quickly get to their desired altitude to intercept.