It looks like an upside-down sombrero.
wait till you see the swimming center, "The water cube".
And China and Russia have teamed up on something called, "Project 149".
149 being the events that china and russia are not normally involved in or favored in any given summer olympics. Their planned goal is to dominate every single event at the games and make sure the USA doesn't recieve more medals than either of them. The chinese and russian olympic teams are even training at the same facilities.
The chinese are pulling out all the stops on their gymnastics and swimming programs. Its you "win gold or your a national discrace" time.