四海

four seas—whole country;whole world
放之～而皆准的真理 universally applicable truth/来自五湖～ come from all corners of the country /～飘零drift(or wander) from one place to another; lead a vagabond’s life/～升平 peace in the whole country or world /～为家regard any place in the world as one’s home;make one’s home wherever one is/～一家the whole country(or nation)is one family