良缘 (liáng yuán) — Good Marriage Affinity · A Match Graded Good · Fortunate Tie

Living Mandarin reaches for 良缘 when a match is being graded, not when a meeting is merely being noticed. Dictionaries open on 美满的婚姻 — a good marriage affinity — and keep a wider second sense, 美好的缘分, a good connection of any kind. The wedding register is where the compound works hardest: 喜结良缘 on the banner, 天赐良缘 in the congratulations book, 结成良缘 in ordinary speech. The antonym printed beside it is 孽缘 — a tie formed badly — which is how you know 良 is doing real work rather than decorating 缘.

The two halves arrive with different jobs. 良, in 《说文》, is 善也 — good, of sound quality — and there is no library page for the single graph. Here it is not the instructional 善 of 善缘 (workmanship of how you leave a dealing). It is a grade on the affinity itself: this connection counts as a good match. [See 缘 →](/library/yuan-affinity/) keeps the older edge-and-alongside thesis: 缘 reports that two lines ran together, and mostly refuses to say whether that was fortunate. Welded into 良缘, the refusal softens. The compound still points at the tie, but it no longer stays neutral about the tie's quality.

Classical Chinese already used the pair before it settled as wedding stock. 陆机's Western Jin rewrite of the Cowherd-and-Weaver poem puts 无良缘 where the river cannot be crossed — the missing good affinity is exactly what keeps the stars apart. 李商隐, centuries later, can say 旧好隔良缘 of friendships blocked by politics, still using the compound for a valued connection cut off. By the Qing stage play 蜃中楼 the wedding sense is blunt: 国色难逢，良缘不再 — beauty like this is rare, and a good match does not come twice. The modern gift scroll keeps that marital tip.

At a Chinese wedding the four-character lines that hang and get said out loud already sort into different jobs. 百年好合 asks for the quality of the union across a counted life. 白头偕老 asks that both people still be there when the hair has gone white. 花好月圆 names the evening as complete. 缘 alone points backward at the sequence that had to run before the two were in the room. 良缘 sits closest to that last job, and then grades it: 喜结良缘 and 天赐良缘 treat the affinity as already good before the vows finish. Taiwan's Ministry of Education idiom book lists 天赐良缘 among wedding 题辞; Mainland usage prefers 赐 over the archaic 锡 of 天锡良缘.

Buyers choosing among library neighbours should keep the fences clean. 善缘 is the connection you can be told to go and form well — 广结善缘 — and it is mostly plural and not conjugal. 恩爱 is mutual kindness between spouses that neighbours can already see. 琴瑟 is whether two instruments still answer. 良缘 is the match graded good — the fortunate marital affinity the ceremony ties, and the anniversary can still name without pretending the decades were the whole story.