卧薪尝胆 | Chinese meaning

卧薪尝胆【wò xīn cháng dǎn】

lit. to sleep on brushwood and taste gall (like King Gou Jian of Yue 勾踐|勾践[Gou1 Jian4]), in order to recall one's humiliations) (idiom)
fig. to maintain one's resolve for revenge

lit. to sleep on brushwood and taste gall (like King Gou Jian of Yue 勾踐|勾践[Gou1 Jian4]), in order to recall one's humiliations) (idiom)
fig. to maintain one's resolve for revenge