Work under the roof
It is a Chinese idiom. Pinyin is w ū Xi à Zu ò w ū, which means the overlapping of organization or article structure. It comes from the notes of Wengong in Song Dynasty.
The origin of Idioms
Song Qi's "notes of song Jing Wen Gong · explanation of Customs" says: "the ancients ridiculed the house and believed in it!"
Idiom usage
There is no innovation
Analysis of Idioms
Building a house under a house
Work under the roof
Lose the liver and write the gall - shū gān xiě dǎn