The free seal is mainly used to fill in the blanks, such as the first seal and the corner seal, which play a decorative role. Its content is mainly text, followed by zodiac seals. If it is used on a work, its size should generally not exceed the name seal and house number seal at the signature, and it should not visually overwhelm the main image. 1. Text: usually auspicious words, inspirational words, personal experiences, famous quotes. The number of words is generally not many, the less is one or two words, such as auspiciousness; the more is about ten words, such as a famous saying or one or two lines of poetry. 2. Zodiac seal: Engraved with animal or character shapes, such as animal signs, other auspicious animals, and Buddha statues.