The cultural significance of 苍蝇 (cāngying) goes far beyond the insect itself. While the West also uses “fly” or “pest” to describe annoying things, the Chinese usage has a unique and potent political dimension.
This metaphor is universally understood in China. A news report about a village official being investigated for bribery is a classic example of “swatting a fly” (打苍蝇, dǎ cāngying). This is different from the Western concept of a “fat cat,” which usually implies wealth without the specific high-rank/low-rank distinction.
You will encounter 苍蝇 (cāngying) in three main contexts: