塞翁失马安知非福 (塞翁失馬安知非福) sāi wēng shī mǎ ānzhī fēi fú

sāi wēng shī mǎ ānzhī fēi fú phrase the old man lost his mare, but it all turned out for the best; a blessing in disguise
Domain: Proverb 谚语
Notes: Also written 塞翁失马焉知非福 (CC-CEDICT '塞翁失馬安知非福')