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lǎo shì
chūn qiū shí dài huán gōng chū zhēng
gōng běi fāng xiǎo guó
de shí hòu shì chūn tiān biàn
cǎo yīn yīn
绿
huí lái de shí hòu shì dōng tiān bái
xuě máng máng kuáng fēng hǒu
shì huán gōng de duì shī le
fāng xiàng
zhǎo dào huí de jiā
hěn zháo zhè shí huán
gōng de zǎi xiāng guǎn zhòng shuō
yòng lǎo de jīng yàn
shì huán gōng pài rén tiāo xuǎn le
lǎo zài qián miàn yǐn
guǒ rán zǒu chū le zhǎo dào
le huí de dào
 
lǎo shì zhè chéng
yòng lái yǒu jīng yàn de rén
shú qíng kuàng bàn shì xiào guǒ hǎo
In the Spring and Autumn Period, Duke Huan of Qi led an army to attack a small state in the north.
They went in spring when green grass covered the ground.
But when they came back it was winter.Everywhere was white with snow and the wind was howling.The troops lost their way.
While everybody was worrying, Guan Zhong, the duke's chief minister, suggested: 'An old horse may know the way.'
So the duke ordered several old horse to be selected to lead the army. Finally, they found the way back home.
This idiom refers to the value of experience.
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