I'm sure you're right - at some point the state should obviously do something, but I wouldn't hold my breath - anyway, no bad effects so far. I wonder how many people in Yunnan boil & drink it regularly - my guess is, most.

I don't know the cost of Keats or KCEL now but they certainly used to be considerably cheaper than 12,100 rmb/yr., suggest you contact them through their advertisements here. I don't know that the teaching is any better at the universities.

Hey, I'm just speculating, not doing math or testing water. Wonder what it costs in gas to boil a gallon of tap water.
But I'm not arguing with your business idea, and I know, very approximately, about the tap water, as do all Chinese, and realize something of what boiling does and what it does not do.

To some extent I think maybe you can, but the external cut throat environment will limit the services and mutuality provided internally according to their overall competitiveness in economic terms. I think this happens to families as well, which may have something to do with the forces that reduce family size within a society as more & more people wind up in modern, urban, competitive capitalist environments - the same environments that eventually swallow small businesses by, e.g., Walmart, which isn't run like a family.

Well, one difference is that the home doesn't have to run like an enterprise - get the Japanese movie "The Yen Family" to see a hilarious take on what happens when it is. Ran for about two years in Hong Kong in the 90s. Very funny - man pays wife every time they screw, mother pays kids for taking out trash, kids pay father for helping with homework; kids pay mother for making them sandwiches for lunch, sell some to other kids at school at a profit, come home & mother takes a cut as business manager, etc. Everything dissolves into numbers, and they have business meetings, argue about pay scales, go on strike, etc.