Heavy anti-ship / ground-attack platform ... as far as i knew J-11 and J-10 designed for air-combat & dogfight like F-15/Su-27 & F-16, JH-7 and new J-18 'Su-34 alike' designed for anti-ship / frontline bomb like Su-24 & Su-34, J-16 designed for multi-role mission like Su-30 ... J-20 for stealth air-combat like F-22, J-31/FC-31 for stealth multi-role like F-35.
Above is the difference between China fighters.
J-18, China version Su-34 looks like true ... at least photo is real.
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Yes ... now China only lack powerful strategic bomber, H-6 fleet is old latest H-6K still weaker & shorter than B-1,Tu-160 and B-2 flight range. The only solution is to design a new bomber, better stealth. I heard we have a H-20 stealth bomber project under progress in North-West China.