收之桑榆 Gain in the West
Explanation
指虽然开始有所损失或失败，但最终得到补偿或取得成功。比喻虽然暂时遇到挫折，但最终会获得成功或得到好结果。
It means that although there are losses or failures at the beginning, there is eventually compensation or success. It is a metaphor for the fact that although one temporarily encounters setbacks, one will eventually achieve success or a good result.
Origin Story
东汉时期，名将冯异跟随光武帝刘秀征战沙场。有一次，冯异率领军队与敌军交战，由于轻敌冒进，损失惨重。但他并没有灰心丧气，而是立即调整策略，加强防御，并采取了迂回包抄的战术，最终取得了决定性的胜利。光武帝赞扬他说：‘始虽垂翅回溪，终能奋翼黾池，可谓失之东隅，收之桑榆！’这个故事体现了冯异临危不乱，善于总结经验教训，并能从失败中吸取教训，最终取得成功的精神。
During the Eastern Han Dynasty, the famous general Feng Yi served under Emperor Guangwu of Han. Once, Feng Yi led his troops into battle against the enemy, but due to overconfidence and hasty advance, they suffered heavy losses. However, he did not lose heart, but immediately adjusted his strategy, strengthened his defenses, and adopted the tactics of flanking and encircling, eventually achieving a decisive victory. Emperor Guangwu praised him, saying: 'Although he initially lowered his wings and returned to the stream, he was finally able to spread his wings and cross the pond. It can be said that he lost in the east but gained in the west!' This story reflects Feng Yi's ability to remain calm in critical situations, to learn from experience and lessons, and to ultimately achieve success by learning from failures.
Usage
常用于表示虽然前期有损失或失败，但最终获得成功或补偿。
Often used to express that although there were losses or failures in the early stage, success or compensation was eventually obtained.
Examples
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虽然这次考试失利，但只要努力，就能收之桑榆，弥补之前的遗憾。
suiran zhe ci kaoshi shili,dan zhi yao nuli,jiu neng shou zhi sangyu,mibushi zhiqian de yihan.
Although he failed the exam this time, as long as he works hard, he can make up for the previous regret.
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他前半生虽然经历坎坷，但后半生却功成名就，可谓是失之东隅，收之桑榆。
ta qianban sheng suiran jingli kanke,dan houban sheng que gongchengmingjiu,kewei shi shi zhi dongyu,shou zhi sangyu.
Although his first half of life was bumpy, he succeeded in his second half of life. It can be said that he lost in the East but gained in the West.