The PLAAF has never been a big fan of western style heavy warloads with dozen+ missiles per plane.
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West never really had 12+ missiles per plane. At least not as designed for the plane initially, and as used regularly. Highest number was 8 missiles per plane. In cold war, Four planes had that capability, and two of them were interceptors, mainly designed to deal with Soviet bomber planes.
Tornado ADV, the only European plane, carried 4 BVR and 4 wvr missiles.
F14 carried 6 BVR and 2 wvr missiles.
The third plane was f15, whose acceleration and speed requirements also basically stemmed from Interceptor roles. It carried 4 BVR and 4 wvr missiles, as designed. (Before amraam came)
Fourth one was f4, with 4 BVR and 4 wvr.
All other us and European planes in service with nato countries by the end of cold war carried 2-6 missiles.
F5 carried only 2 wvr.
F8 carried 2-4 wvr.
F16 carried 4 wvr. Only a handful of airframes in 1989 carried 2 more BVR missiles in addition to those 4.
F18 carried regularly 4 BVR and 2 wvr. Though in theory it could have carried 2 more BVR instaed of drop tanks, but AFAIK that was not practiced.
Mirage F1 carried 2+2
Mirage 2000 carried 2+2
Mirage III carried 1 BVR and 2 wvr.
Today, situation is a bit different but 12+ planes are still not really used.
F15 mostly uses 6 BVR and 2 wvr.
F16 used 4 BVR and 2 wvr
F18 uses 4-6 BVR and 2 wvr, mostly.
F18e uses two more on top of the above.
Hornet CAN carry more with it's dual amraam racks, but it's seldomly practiced. F18 can thus, in theory, carry 10 BVR and 2 wvr. And f18e is the only Western plane that can in theory use 12+ missiles, or up to 14. But there are no such images anywhere.
M2000-5 can carry 6 missiles
Eurofighter 6+2
Rafale 8 missiles ( though mostly it carries 6) (despite the fact that rafale demonstrator plane could in theory carry 10)
Gripen carries 4 missiles.
F22 was designed for 4+2 but in the end carries 6+2.
F35a carries 4 BVR, with other variants usually up to 2 more wvr externally.
And actually even Soviets didnt carry 12+ missiles. Before su27 came, their planes carried less missiles on average. 4-6. (With smaller wvr missiles, too and fewer BVR missiles)
Su27 carried 4 BVR, 2 specialized BVR/wvr and 2-4 wvr, depending on jammer carriage.
Su30 increased that to up to 8+2/4, if r77 is carried.
Su35 can do, in theory, 10+2, if no wingtip jammers carried.
Mig29m/k can do 4-6 BVR and 2 wvr, depending on number of drop tanks carried.
So... Considering the number of flanker platforms within Chinese air forces, and the fact most planes carrying just 4 missiles are increasingly getting retired (j10b carrying up to 6), plaaf and planaf are not doing bad in number of missiles at all.