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
It's better to see it in person than to hear it - chuán wén bù rú qīn jiàn