created sense approved 东兔西乌/東兔西烏 · dōngtùxīwū · passage of time
东兔西乌 / 東兔西烏
dōngtùxīwū
passage of time
the moon rising in the east and the sun setting in the west, referring to the flow of days and nights and the swift passage of time
慨叹东兔西乌，岁月如梭，不知不觉中人已中年。