铸山煮海 excavate copper from mountain mine for coining and cook sea-water for salt -- to develop natural resources; cast a mountain of brass into cash and boil the sea down for salt
四海为家 feel at home wherever one goes; lead a wandering life; make one's (happy) home everywhere; make one's home wherever one is; settle down [make one's home] anywhere within the four seas; settle down in any corner of the world for a certain cause; wander about the world