1. Calligraphy reduplication is a method of arranging poems according to certain rules, which can be used to typeset Oracle Bone Inscriptions.
2. Take a poem with the word 10 as an example, you can first fold it vertically into three equal parts, but leave the left and right edges;
3. Divide it into five equal parts (the upper and lower lines should also be set aside), the first and second lines should be five words, and the third line should be signed.