One theory is that it comes from Zhao Heng's "Li Xue Pian", the original poem is as follows:
A rich family does not need to buy fertile land, there are thousands of millet in the book.
You don’t need to build a high-rise building to live peacefully. There is a golden house in the book.
Don’t hate an unscrupulous matchmaker when marrying a wife, there is beauty in the book.
Don’t regret having no one to follow you when you go out. There are so many carriages and horses in the book.
The man wants to fulfill his life ambitions and reads the Six Classics diligently in front of the window.
"The book has its own golden house, and the book has its own beauty like jade" summarizes the purpose and pursuit of many scholars in the past. "Golden house" refers to a luxurious and precious life, and "Yan Ruyu" refers to a beautiful woman. In fact, listing these two is just a metaphor. They are the most representative gains after becoming famous in the gold list. Here, they are also referring to the famous names. The purpose of many scholars in ancient times was to get ahead in their studies. Therefore, people often use this sentence to encourage others or their children to read.