對牛彈琴

First attested in c. 3rd century CE in the story of the Warring States-era musician Gongming Yi (公明儀) playing the zither to a cow, recorded in Mouzi Lihuolun. Mouzi used this example to illustrate the correct way to explain Buddhism to people with Confucian backgrounds.

公明儀為牛彈《清角》之操，伏食如故。非牛不聞，不合其耳矣。轉為蚊虻之聲、孤犢之鳴，即掉尾、奮耳，蹀躞而聽。 [Classical Chinese, trad.]

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公明仪为牛弹《清角》之操，伏食如故。非牛不闻，不合其耳矣。转为蚊虻之声、孤犊之鸣，即掉尾、奋耳，蹀躞而听。 [Classical Chinese, simp.]

From: Sengyou, Hongming Ji, c. 5^th Century AD

Gōngmíng Yí wèi niú dàn “Qīngjiǎo” zhī cāo, fú shí rúgù. Fēi niú bù wén, bù hé qí ěr yǐ. Zhuǎn wèi wén méng zhī shēng, gū dú zhī míng, jí diào wěi, fèn ěr, diéxiè ér tīng. [Pinyin]

Gongming Yi played the song Qing Jue to a cow. It continued eating grass as if nothing had happened. [The problem] was not that the cow did not listen, it was [the music] not suitable for the cow's ears instead. He then made noises of mosquitoes, flies, and lone calves, and the cow started wagging its tail, turned its ears, and listened while strolling.

對牛彈琴 (chengyu)

1. to talk about something that one's listener can not understand or turns a deaf ear to; to talk to a brick wall

Others:

• → Japanese: 牛(うし)に対(たい)して琴(こと)を弾(だん)ず (ushi ni tai shite koto o danzu) (calque)
• → Vietnamese: đàn gảy tai trâu (calque)
• → Thai: สีซอให้ควายฟัง (sǐi-sɔɔ-hâi-kwaai-fang) (calque)