Assuming this refers to my post above, as I stated, it was a first hand account from someone I know and trust.
You can trust whom you like, but did you ask him in which town this happened? Did he report said establishment and ensure it was closed down? Did he take the time to explain to the poor restaurant owners that their method of rinsing rice had numerous disadvantages; as well as the obvious administrative risks, it's incredibly wasteful of water in an area where such things count, and the water pressure would knock most of the rice out of the colander, forcing them to pick it back out of the bowl grain by grain or just flush it away and try again. The story is obviously absolute nonsense and was probably told in the context of playful banter and joke telling. It's just a pity that it still seems acceptable to have our Chinese brothers and sisters at the pointy end of such infantile nonsense.
Edit; I have a cousin living in overseas who once told me she saw a story on the television saying that Australians are so rich and stupid that some have bathtubs with solid gold taps, and they only use the bathtubs for sheepdip, certainly not for bathing, which was something they only did in the surf. I told her not to believe such arrant nonsense, however much she trusted the source.