Correct
金不换
/ jīn bù huàn /
Strokes
Example
Definition
not to be exchanged even for gold; invaluable; priceless; precious; be more valuable than gold
1
Làngzǐhuítóujīnbùhuàn
浪子回头金不换
。
A prodigal's repentance for his actions is more precious than gold.