reculer pour mieux sauter
/rəˌkjuːleɪpʊəmjəː- ˈsəʊteɪ,〈法〉 ʀəkyle puʀ mjø sote/- used in reference to the use of a tactical withdrawal, or of an apparent setback, as a basis for further advance or success（战术）以退为进。
词源
French, literally 'draw back in order to make a better jump'.