A friend said he was cheated out of paying for expensive tea leaves. He tasted tea from a big tea-leave bag, liked it, and bought some (from the same bag). After he got home, he made tea himself but it did not taste good. He concluded that he was cheated by the tea farmer.
The same thing happened to me, right now; but I came up with a different conclusion. It's not the tea, stupid; it's the water (from the pipes in Beijing) that tastes bad.