This is the international face of China's might, where during the Cold War (and until recently), the Chinese leadership would sit and watch the much-feared People's Liberation Army on parade below, complete with tanks and missiles, plus other deadly military hardware.
Nowadays for a small fee, one can climb up there and pretend to be Mao Ze-Dong waving to his mighty army below. There's a sign which forbids photography, but people are snapping pics merrily, oblivious to the security folks who just watch. There's even a kiosk selling films and batteries, so there you go! Capitalism rulez....