灼灼琅骨
[zhuó zhuó láng gú]
The term can be translated into 'Fiery Crystal Bones'. 'Zhuo Zhuo' can mean shining brightly while 'Lang Gu' originally means jade bones. Here it metaphorically suggests the inner brilliance, resilience or pure strength that one possesses within their spirit or soul, like radiant, precious crystals hidden in one's core.