Day and night
Chinese idiom, Pinyin is zh ā och é NGX ī Hu ǐ, which means to describe the speed of renovation. It's from Imperial science policy.
The origin of Idioms
Su Shi, Song Dynasty, wrote the imperial policy of trial production. "The cost of the imperial palace is no less than that of the enemy country. The work of the imperial palace is made day by day and is destroyed day by day, so as to make it new."
Idiom usage
As an object or attributive, it means to change quickly.
Day and night
be in harmony with the rest of the world - hùn sú hé guāng
Felt socks and foot binding boots - zhān wà guǒ jiǎo xuē
the handiwork remains though the maker 's gone - wù zài rén wáng