逆流溯源

nì liú sù yuán

Meaning

to go back to the source

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Characters

逆nìto disobey, to rebel; traitor, rebel辶屰流liúto flow, to drift, to circulate; class氵㐬溯sùto paddle upstream, to go against the current; to trace the source; formerly氵朔源yuánspring; source, root, head; surname氵原