他山之石可以攻玉

1. • lit. the other mountain's stone can polish jade (idiom) to improve oneself by accepting criticism from outside
2. • to borrow talent from abroad to develop the nation effectively

Character by character

• 他(tā)him
• 山(shān)surname Shan
• 之(zhī)(possessive particle, literary equivalent of 的 de)
• 石(shí)surname Shi
• 可(kě)can
• 以(yǐ)use
• 攻(gōng)attack
• 玉(yù)jade