Originally Posted by
MSPeconomist
I've been told that traditionally in China, north of some line buildings (for ordinary Chinese apartments and offices) can have central heat and south of the line, they have AC. Obviously this doesn't seem to apply to international hotels, etc. Shanghai seems to have AC so I would assume that some buildings get cold in winter. Wuhan is said to be south of the line.
FYI - the "line" defining north and south China is the Yangtze river. But this is public heating. Some places have private heating systems.