山水有相逢.........................

山水有相逢

(1) idiom: paths cross
http://idioms.thefreedictionary.com/paths+cross

Usage Examples:
"Our paths will cross again someday";
"Their paths will cross"

(2) idiom: It's a small world
http://www.goenglish.com/ItsASmallWorld.asp

Usually this idiom is used when you meet someone in an unexpected place, but it can also be used to refer to "it's always possible to meet again in the future, somewhere, someday", thus:

the usage:
"We will meet again, it's a small world afterall !"