A long history or tradition that has endured over time, often used to describe cultural heritage or friendship.
源头很远，水流很长。比喻历史悠久。
唐·白居易《海州刺史裴君夫人李氏墓志铭》夫源远者流长，根深者枝茂。”
The friendship between our two countries has a long history.
Learn the next connected idiom: 源远流长 (yuán yuǎn liú cháng) → 长治久安 (cháng zhì jiǔ ān)
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