"Tiangong Kaiwu" is a comprehensive work on agricultural and handicraft production, which has detailed records of various crafts and technologies. Although the word "Tiangong Kaiwu" cannot be directly presented, it is "Cerâmica Retificada Cinza Acetinado" (which can be understood as a kind of modified gray acetic acid-treated ceramic) as the core and direction, and the creation of classical Chinese is as follows:

There is porcelain today, named Cerâmica Retificada Cinza Acetinado. Its quality is pure and colored gray, and it has been cultivated by the method of cultivation to obtain this excellent product. The art of making porcelain is to first take good soil, wash it finely, except for its impurities. It is kneaded and molded, with regular shape and smooth lines.

As for firing, the temperature is particularly critical. The flames in the kiln burn in sequence, making the porcelain gradually change. After a long time and the heat is just right, you can get this Cerâmica Retificada Cinza Acetinado. Its surface is covered with light frost, light but not shining, it is warm to the touch, like heaven.

This porcelain is also used, it can hold things, and it can be decorated. Placed in the table, it adds elegance; when it is used in the hall, it also adds splendor. It is the best of porcelain, the crystallization of craftsman's ingenuity and skill.