对牛弹琴

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

Character by character

• 对(duì)right
• 牛(niú)surname Niu
• 弹(tán)pluck
• 琴(qín)guqin 古琴 gǔqín