山中野猫匆匆过客
[shān zhōng yĕ māo cōng cōng guò kè]
'The Wildcat in the Mountain Rashes by as a Stranger' expresses a transient, solitary lifestyle. As cats tend to act aloof, this idiom describes the image of someone passing through the hustle and bustle just like a wild animal passing through its habitat, leaving only a fleeting figure with an ephemeral, evanescent, even melancholy sense.