养兵千日，用在一朝
yǎng bīng qiān rì , yòng zài yī zhāo
lit. train an army for a thousand days to use it for one morning (idiom)
fig. extensive preparation eventually pays off
yǎng bīng qiān rì , yòng zài yī zhāo
lit. train an army for a thousand days to use it for one morning (idiom)
fig. extensive preparation eventually pays off