The seal on the painting and calligraphy works is not only used to identify the authenticity, but also an integral part of the whole work. Wu Changshuo, a painter in the Qing Dynasty, thinks that "calligraphy and painting are elegant, and printing is also important. Those who are skillful in painting and calligraphy will get better printing and better color. " A good seal is like the finishing touch, which makes the painting and calligraphy more colorful.
近代国画大 师齐白石的《荷花倒影》图，画艺十分精妙。夏日池塘水面上荡起粼粼波纹，半开的荷花倒影在水中，小蝌蚪争相戏影，一方“木人”(画家曾为木匠，故名)朱红印 章，正好钤在荷梗和倒影之间的空灵处。说明大 师不仅题跋讲究，而且善于押章用印，使其与整个画面相辅相承，相得益彰。
The painting of lotus reflection by Qi Baishi, a master of modern Chinese painting, is very exquisite. In summer, the water surface of the pond is rippling, the half open Lotus is reflected in the water, and the tadpoles are competing to play with each other. One side of the "wooden man" (the painter used to be a carpenter, so his name) has a red seal, which is right between the Lotus stem and the reflection. It shows that the master not only pays attention to the inscriptions and postscripts, but also is good at using seals to make them complement and complement the whole picture.
Tang Bohu's painting "the picture of stork and Plover with withered stubble" in the Ming Dynasty shows a curly withered stubble with few leaves and a stork and Plover with cocking head and singing. The composition of the painting is simple and elegant, and there is not much ink. The upper right and lower left are blank. Two lines of poems are inscribed on the top right, with the inscription of "Tang Yin" on one side after it is signed; At the lower left, there are two pressure angle seals, which echo the famous seal, forming symmetry, making the composition stable but not rigid.