不屈不挠

Explanation: Qu: yield; flexible: bending. Analogy in the face of pressure and not to yield, performance is very tenacious. 　　Usage: Joint type; as predicate, attributive, adverbial; with compliment, describing one tenacious 　　Source: Han Ban "pass down the Han Syria": "Lechang Tokujitsu, not radial (radial) does not bend (flexion)." 　　Examples: Hundred years, our ancestors had worked with the reactionary forces at home and abroad ~ the struggle. 　　Riddle: Bending scratching Thesaurus:  Indomitable, Make light of Sway, hang on by the eyelashes, keep one's end up, persist in sth.