Basketball Big in China

My second day in Ya'an, I went to shoot around at mid-day. A bit hot.
One fella was playing. English speaker (to some degree), and we agreed to meet later to play, when it cooled down.

The pics below is what I came to.
This is the scene everyday, starting about 4pm to 7ish.
12 half-courts full, with 4 on 4 games going on, with people waiting to play.
They play up to 5 when a team is waiting, otherwise the game just goes on, with no score keeping. BTW, there are 2 other main courts like this, completely full.
Also, there is badminton and volleyball courts and soccer fields being played on as well. An active student body, no?