This is an English allusion - Rome was not built in a day.

It originated from an ancient legend:

It is said that the princess, a descendant of the Trojan prince, came to Sisilvia was blessed by Mars, the god of war, and gave birth to twin brothers Romanus and Remus. When the king found out, he killed their mother, put the brothers into a basket, and threw them into the rolling Tiber River. It was a she-wolf who rescued them and fed the two brothers with her own milk. Later, when the two brothers grew up, in order to avenge their mother, they tried to kill the king. These two talented children raised by wolves built the city of Rome overnight.

Later, as time went by, the meaning of this sentence slowly changed. Due to the advanced and complex architecture of ancient Rome, superb construction technology, and exquisite design, later generations used "Rome was not built in a day." , means that many advanced technologies, material civilization, and even an achievement are not achieved simply, but can only be accomplished through many people or a lot of hard work.