What words are engraved on the seal of the calligraphy exam?

According to official regulations, seal script is required for calligraphy grading. Seal script, one of the ancient Chinese characters, also known as seal script, is a general term for ancient Chinese characters. Those who seal the seal spread it, spread its physics and apply it endlessly. The ancients believed that seal script was written by Cang Xie, but this is not credible. The generation of a kind of writing needs a long development process, and it is impossible for a person to complete it in a short time.