China's fighter fleet of jets and attack helicopters like the J-10B/C, J-11B and the Z-10 are expanding about 30 to 40 a piece each year. Not very impressive. Just look at the US Soviet military buildup in the 1980's they are each doing the multiple of that each year for their air forces and then some more you have the nuclear arms race, the space race, the race to build nuclear subs, the race to expand their strategic bomber forces (something that China hasn't started yet), the race to build more ballistic missile's nuclear and other kinds and fighting proxy wars, building overseas bases and propping up client regimes all over the world at the same time. Now that was a military buildup !
But then again that's the period that the US turned into a net debter nation and never looked back. And the USSR is no longer with us.