开工

开工	kāi gōng	to begin work (of a factory or engineering operation) / to start a construction job
开	kāi	to open (transitive or intransitive) / (of ships, vehicles, troops etc) to start / to turn on; to put in operation; to operate; to run / to boil / to write out (a prescription, check, invoice etc) / (directional complement) away; off / carat (gold) / abbr. for Kelvin, 开尔文 / abbr. for 开本, book format
工	gōng	work / worker / skill / profession / trade / craft / labor