四海
four seas—whole country;whole world
放之～而皆準的真理 universally applicable truth/來自五湖～ come from all corners of the country /～飄零drift(or wander) from one place to another; lead a vagabond’s life/～升平 peace in the whole country or world /～為家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
四海sì hǎi
four seas (brain,thorough-fare vessel,Danzhong acupoint,stomach)