Today's bit of useless information.
China is divided by the government into North and South, the demarcation line being the Yangtze River. As a result of this only government offices in the North of China are heated during the winter. In a city like Wuhan, which straddles the Yangtze, all the government offices are on the north side, as is most of the commerce for the same reason. Shanghai is another example where all the banks and business were erected on the north side of the river, the same in Chongqing and Luzhao.
Modern heating and insulation has taken the chill off modern buildings so now they are spreading south.