Meaning of yuán tóu:
yuán tóu
源头
Noun
source; fountainhead
Wǒmen yīnggāi zhǎodào wèntí de yuántóu.
我们应该找到问题的源头。
We should find the source of the problem.
Zhège hú bèi rènwéi shì héliú de yuántóu.
这个湖被认为是河流的源头。
This lake is considered the fountainhead of the river.