What are the artistic features of Qin seal script method?

In the Qin Dynasty, Qin Shihuang unified the chaotic characters of the six countries and formulated the Qin Zhuan, also known as "Xiao Zhuan". Qin Zhuan used the word Xiao Zhuan. At the same time, it is stipulated that only the seal of the emperor can be called a seal, and all subjects are called "seals". The word "seal" appeared in seals and was first seen in the Qin Dynasty. During the Warring States period, there were many white castings, while in the Qin Dynasty, most of them were block printing, mostly white. The layout is mostly square. Tian Zige distributes the printed words evenly on the printed surface, and the composition shows a reasonable arrangement between the virtual and the real and the density. There is also a low-level official seal called "semi-pass seal", which is half of a square official seal and rectangular. It is natural to use a Japanese-style frame to split the seal in two, or to distribute it evenly, or to distribute the area according to the number of calligraphy and painting.