This was actually somewhat of a weak point in the story: Chinese people do not leave the heater off out of frugality but because they think it's unhealthy to have a large temperature difference between the outside of a container (a house, say, or your own body) and the inside.
Of course modern, wealthy Chinese are starting to eat ice cream in summer and turning on the heat in winter (and, to be fair, in places where it gets really, really cold, like in Beijing, they've always had heating in winter) so this attitude is changing, but some of it still persists. Bottled water (and beer in restaurants!) is mostly sold unrefrigerated and Chinese shopping malls in summer are nowhere near as glacial as their counterparts in SE Asia or the west.
Is that because you're so ascetic that you haven't cut your hair or fingernails in 20 years and they are literally attached to your central heating? :-)
That wonderful temperature between 21-22ºC is truly excellent. Paris in the springtime.
But you can take my heat and air conditioning out of my dead, 72°F hands.