一片冰心在玉壶
yī​piàn​bīng​xīn​zài​yù​hú

pure and honest heart

  1. 一片 yī​piàn numeral
    [measure for abstract feelings]
    a slice of; a show of; used for intentions or feelings, such as a slice of kindness or a show of sincerity
  2. 冰心 bīng​xīn
    moral purity
    a heart as pure and clear as ice; refers to a person of high character and integrity who is indifferent to fame or fortune
  3. 在 zài preposition
    to be at
    To be located at, in, or on; to be present or at home.
  4. 玉 yù noun
    jade
    precious stone that is hard, translucent, and lustrous, including both nephrite and jadeite; used for jewelry and carving
  5. 壶 hú
    opaque (segment carries no independent meaning)