四海之内皆兄弟

四海之内皆兄弟

Literally means:

all men are brothers within the four seas

Actually means:

四海, which literally means the four seas, means all over the country, all over the world or everywhere. 皆, all are.

This phrase means all men in the world are brothers or friends. It also means that we can meet people or friends that are just like brothers. Commendatory.

四海，指全国各地，也指全世界各地，指到处的意思。皆，都是。

四海之内皆兄弟，指天底下的人都是兄弟或，朋友，或到处都可以遇见像兄弟一样的人或者朋友。具有褒义色彩。