Seal is an important proof to win people's trust. There are two kinds of seals: the seals used by painters themselves and the seals collected by collectors. The painter himself sealed his works, which gradually became popular with the widespread use of famous works. After finishing the work, the painter should add a cymbal seal in addition to his signature to show that he made it himself. The seals on calligraphy and painting are mainly divided into three categories: one is the seal of the author himself. Second, the signer's seal. Third, the seals of collectors and connoisseurs. These seals are divided into three aspects: first, the name, font size, hall number and hall number seal; Second, write at will, seal auspicious words and aphorisms. Third, collect and appreciate seals. Name and font seal: generally stamped under or around the author's name. Zhai Guan and Tang Hao usually affix their seals around or below the words, which are also used to say hello, and cover them in the upper right corner. The seals of articles, auspicious words and aphorisms are generally covered in the lower left corner of calligraphy and painting as chess pieces and greetings. Collecting and appreciating stamps are generally covered on the left and right corners of calligraphy and painting, or they do not hinder the blank space of calligraphy and painting works themselves, and can also be covered on mounting other than calligraphy and painting. The most conspicuous position of calligraphy and painting also has a cover to show authority, such as Qianlong and Jiaqing Emperor. The rectangular chapter you mentioned, which we call the flat chapter, is generally covered in the upper right corner of calligraphy and painting, and the printed content is often prose, auspicious words, epigrams and the like. There are also round or oval chapters. Moreover, the square chapter you mentioned is the chapter used when signing, mostly for the author's own use, usually white. There are also signatures of two parties, such as Fo Yin of one party, Chinese signature of the other party and so on. I can't finish the details at the moment. In short, just look at the seals on the books and paintings. By the way, if your son's book suggests only carving such a famous seal in white, the format is (name):

Zhi @

Print @

Or (say three words)

@@

Print @