无价之宝 (wú jià zhī bǎo): priceless treasure

Grandma says that having the whole family together and safe is the most precious priceless treasure of her life.

After the earthquake, he risked his life to rescue the neighbor's child from the rubble, and everyone said his courage was a priceless treasure.

At graduation, my teacher gave me a notebook she had handwritten, telling me that knowledge is a priceless treasure and I should cherish it.

After years of treatment, he finally regained his health. To him, being able to breathe freely again is a priceless treasure.

This museum houses an ancient bronze artifact that experts call a priceless treasure, attracting many tourists to visit.