The ESL teachers housing has NO CENTRAL HEATING and also the classrooms have no heating and broken windows during the very cold Henan winter. I had to stay in a cold classroom 8 hours a day in December and after a while I did understand that the school has no heating for the whole winter time! When I complained about the lack of heating in the winter, the school headmaster advised me to wear more layers of clothes and do not go barefeet.

Well, Alice, Hello. Central Heating is not the 'be all and end all; central heating only means that the boiler/generator of the heating is centralised is a particular place, and sometimes quite remote from servant heating outlets in your flat. I assume you managed quite well by plugging in electric fires because you didn't say that your flat was cold; only that the classes were, because of the broken windows. Broken windows or not, central heating or not, middle schools and universities are more often than not cold, because the students themselves like to very annoyingly open the windows- not much you can do about that one. Your headmaster sounds very wise; although, you going around bare-footed in winter must have exasperated him. Yes, and he's right about the many layers of clothing needed too.