China used night soil as fertilizer historically; they don't anymore (when was the practice abandoned, I wonder? And is there any Chinese interest in terra preta?), but it got them into great habits. The same is true for at least Korea and Japan; I don't know as much about Southeast Asia.
Only drinking hot drinks also helped China's health. Fernand Braudel, in The Structures of Everyday Life, discusses this in passing; even 17th-century observers felt that it would be better for the Spanish colonials to adopt Chinese practice in the Philippines rather than keeping their custom of drinking everything iced. (Where did they get the ice?) Braudel also mentions a case where St. Francis Xavier drank a cup of cold water, to the horror of his Chinese entourage, who warned him not to keep up such a dangerous practice...
Many different cities around the world have an "icehouse" street - the origin of the name being obvious. However, I know of an "icehouse" street in Hong Kong and I always wonder "when the icehouse was here, and this street was named for it, where in the world were they getting ice?"
I know you can pack ice in sawdust and straw, etc., and keep it for the summer, but Hong Kong is a very, very long journey from anywhere that freezes in the winter ... where were they bringing ice from ?
The trouble is that the ice trade is 19th-century, but Braudel quoted a source from the 17th century about taking everything iced.
Can any Filipino reader comment on whether snow ever falls there? I didn't see any snowcaps on Google Satellite View, but that's not the best of sources...
The hot water thing was nothing more than a method to kill bacteria AFAIK. In much of Europe the preferred way of doing that was to produce beer.
Many East Asians to this day still believe that hot water is better for your health, even when filtered water is cheap and plentiful. If you ask for water at a restaurant it will inevitably be warm. I've had people express concern when drinking cold water during the winter, or when I'm sick.
"In much of Europe the preferred way of doing that was to produce beer."
In much of Europe the preferred way of doing that was indeed to use alcohol, but in more than one form. Beer's usage, compared to other alcoholic beverages, was higher only in germanic and western slavic regions (like Czech). The french, the spanish, greeks, romanians, and maybe others in the Balkan Peninsula, preferred wine. Eastern slavic and northern Europe had their vodka-like beverages. Europe is not only Germany, mind you!
Only drinking hot drinks also helped China's health. Fernand Braudel, in The Structures of Everyday Life, discusses this in passing; even 17th-century observers felt that it would be better for the Spanish colonials to adopt Chinese practice in the Philippines rather than keeping their custom of drinking everything iced. (Where did they get the ice?) Braudel also mentions a case where St. Francis Xavier drank a cup of cold water, to the horror of his Chinese entourage, who warned him not to keep up such a dangerous practice...