What's 10 degrees, presumably at night, like over there in Guangzhou?
Would a person shiver by it going out?
Would shopping streets be deserted in 10 degrees 'C?
Would it be too uncomfortable indoor at hotel rooms? Any heater?

Not so worried about hot sweaty 30'C here in Malaysia, but shivery cold 10'C makes me a bit concerned. Should I, if I'm going there around early December?