對牛彈琴 [对－弹－]

Jyutping deoi3 ngau4 taan4 kam4
Pinyin duì niú tán qín

Definitions (CC-CEDICT)
  1. lit. to play the lute to a cow (idiom)
  2. fig. offering a treat to an unappreciative audience
  3. to cast pearls before swine
  4. caviar to the general
  5. to preach to deaf ears
  6. to talk over sb's head
Definitions (粵典–words.hk)
  1. x
Definitions (Wiktionary)
  1. verb
    to talk about something that one's listener can not understand or turns a deaf ear to; to talk to a brick wall
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    跟小人说理，就如同对牛弹琴。
    跟小人說理，就如同對牛彈琴。
    gēn xiǎo rén shuō lǐ ， jiù rú tóng duì niú tán qín 。
    • Reasoning with a villain is pointless.