塞翁失馬，焉知非福
sāi wēng shī mă ，yān zhī fēi fú
literally:
When the old man from the frontier lost his horse, how could one have known that it would not be fortuitous?
meaning:
A setback may turn out to be a blessing in disguise
Example:
失去那份工作真是塞翁失馬，焉知非福。我現在找到更喜歡的工作。
shī qù nà fēn gōng zuò zhēn shì sāi wēng shī mă，yān zhī fēi fú 。wǒ xiàn zài zhăo dào gèng xǐ huān de gōng zuò 。
Losing that job was a blessing in disguise really, and I found a much more enjoyable career now.
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