Hěnduō xiāngzhèn de niánqīngrén dōu qù dà chéngshì dǎgōng le.
Many young people from small towns have gone to work in the big cities.
Tips
usage
A 乡 'township' (rural) and a 镇 'town' sit at the same level of government, just below the 县 'county', so 乡镇 names that level as a whole. The township and village enterprises that drove rural growth in the 1980s were 乡镇企业.