Yeah in China cold water is considered bad for your health, although as far as I can tell this is more tradition than actual health advice, likely derived from

Yeah in China cold water is considered bad for your health, although as far as I can tell this is more tradition than actual health advice, likely derived from the necessity of boiling water to make it safe to drink before safe running water. It's common to add some green tea leaves and continually top up using the same leaves throughout the day.