源遠流長

yuányuǎnliúcháng

a distant source and a long stream-of long standing and well established

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yuan2 yuan3 liu2 chang2

lit. source is distant and the flow is long (idiom); fig. sth goes back to the dim and distant past, a lot of water has flowed under the bridge since then

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源遠流長|源远流长 [yuán yuǎn liú cháng] ► lit. source is distant and the flow is long (idiom); fig. sth goes back to the dim and distant past ► a lot of water has flowed under the bridge since then