My aunt was stopped at the entrance of the community last year by a young man.
He was wearing a white shirt, with a work badge on his chest, and handed her a glass of water.
He said, "Auntie, try this, it's water from your home faucet. I just fetched it upstairs."
My aunt took a sip, frowned.
The young man said, "You can tell, right? This water is a bit astringent, probably a layer of white scale from boiling in the pot."
My aunt said yes.
The young man said, "That's right. Your building's water pipes are aging, the rust taste is covered up by bleach, but the mineral content exceed