A brutally honest and true-all-over-China bullet point from the latest school Adcom (the committee at the school with the most power-packed punch) meeting minutes:

Heat in the gym is not practical or possible because the walls are too thin to hold the heat.

Best John-Stewart imitation: The walls! They're too thin! It's not that "cold is good for you," folks! It's that the builders were too lazy/cheap to build you good walls! And then nobody is willing to admit it...