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kāi yuán jié liú ㄎㄞ ㄩㄢˊ ㄐㄧㄝˊ ㄌㄧㄡˊ

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Từ điển Trung-Anh

(1) lit. to open a water source and reduce outflow (idiom); to increase income and save on spending
(2) to broaden the sources of income and economize on expenditure