無價之寶 [无价－宝]

Jyutping mou4 gaa3 zi1 bou2
Pinyin wú jià zhī bǎo

Definitions (CC-CEDICT)
  1. priceless treasure
Definitions (Wiktionary)
  1. phrase, idiomatic
    priceless treasure; invaluable asset
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）