岁月流年若相惜高山流水莫相离
[suì yuè liú nián ruò xiāng xī gāo shān liú shuĭ mò xiāng lí]
The phrase evokes admiration for true friends or lovers like flowing water and tall mountains, which never separate. Time cannot fade the mutual understanding (if we treasure and respect each other). The overall meaning emphasizes the beauty of lasting, deep friendship or romance.