The so-called "cooking" books means reading and learning repeatedly, and understanding the contents of books thoroughly.
In the writer Liu Zhixia's study, there is a banner hanging on the wall, on which are written four big characters: "Read every day". Not only books can be cooked, but also words can be cooked. In the Song Dynasty, Dong Siwei wrote a poem "Cooking Chinese Characters" in the poem "Looking Back on the Past in Autumn": "Young criminals speculate, but today they are tired of cooking Chinese characters".