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.