In ancient seals, bird seals and insect seals occupy a large proportion. This popular style in Qin and Han dynasties stored the shapes of birds and insects in square inches, and its book body was twisted and coiled in various ways, giving full play to birds, fish and insects in the natural state on the seal, and the printed surface was like a small pattern of birds and insects singing. "New armor" is a disguised combination of birds, insects and fish. It is lively, compact and full of rhythm. The preface to Shuo Wen says: "Shu Qin has eight styles, one is Xiao Zhuan, the other is Da Zhuan, the third is seal cutting, the fourth is insect book, the fifth is copying, the sixth is official book, the seventh is dead book and the eighth is official book." Worm book is a bird book, and its head looks like a bird. Today, the inscriptions on the sword of Gou Jian, the king of Yue, and the inscriptions on some bronzes such as Ge and spear unearthed in the same period are mostly bird and insect prints. The way to distinguish bird and insect books is to find out the structure from the main strokes of the font, and then understand the font from the shape of the structure, and interpret it by comparing up and down and corresponding left and right. "Wuyi" seal, the original two is yin and yang, the same shape. This Zhu Wen is printed by birds and insects. The word "Wu" starts with a bird, and the short cross at the beginning of the word "Yi" is fish-shaped, which brings out the best in each other.
Bird-insect seal is a creative calligraphy art, which combines insect-bird-arowana with people's artistic conception through exaggeration, and embodies the aesthetic realm of "harmony between man and nature".