go on a wild goose chase
In Chinese, Pinyin is w ǎ NGF è IX ī ns ī, which means to waste your time.
Idiom explanation
A waste of effort. It's the same as "wasted effort".
Idiom usage
It's a waste of time.
go on a wild goose chase
thousand finished and hundred perfected - qiān le wàn dàng
said of a loyal counsellor who gives admonition to the emperor in person - miàn shé tíng zhēng