Meaning of jiā bèi:
jiā bèi
加倍
Verb
to double; to redouble
Wèi le chénggōng, nǐ xūyào jiābèi nǔlì.
为了成功,你需要加倍努力。
To succeed, you need to double your efforts.
Wèi le chéng gōng, tā jué dìng jiā bèi nǔ lì.
为了成功,他决定加倍努力。
To achieve success, he decided to make double the effort.