It's a waste of time
It's a Chinese idiom, Pinyin is á oy ó UF è Ihu ǒ, which means to consume lamp oil, and mostly means to be busy day and night. From a dream of Red Mansions.
The origin of Idioms
Chapter 25 of a dream of Red Mansions: "at this time, Jia amnesty and Jia Zheng are afraid to cry bad Jia's mother. They spend a lot of time on cooking oil day and night and make trouble."
Idiom usage
It means busy day and night.
It's a waste of time
a fish leaping over the dragon gate -- have passed a competitive examination - yú yuè lóng mén
the clouds melt and the mists disperse - yún xiāo wù sàn
extensive experience and knowledge - dān jiàn qià wén
To prosper in the shade of mountains - shān yīn chéng xīng
the pine and the cypress are the last to wither - sōng bǎi hòu diāo