Second, yin and yang engraving. Calligraphy seal cutting includes famous seal (own name, preferably square and round), collar seal (an ellipse is enough at the beginning of the work), corner seal, side seal and waist seal (the middle content of the work is generally the author's native place, less than other seals). To put it bluntly, the famous seal is to prove the author of the work, and the other seal plays the role of matching the work!
The number of seals is generally "no more than five", so it is good to use one for Yin and Yang, or one for Yin and Yang separately!
Third, the inscriptions are generally smaller than the text, but some works in small letters are as big as the text!