民工 (mín gōng) means “migrant worker (who moved from a rural area of China to a city to find work); temporary worker enlisted on a public project”. It is an HSK 6 Chinese word in the HSK 3.0 vocabulary.
许多民工在城市里打工。
Xǔduō míngōng zài chéngshì lǐ dǎgōng.
Many migrant workers work in the cities.
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