What is the level of Chinese characters in Yuanfeng Bao Tong's seal script?

Yuanfeng Bao Tong seal script has four characters. According to the investigation related public information, Yuanfeng Bao Tong seal script is named Dongpo Yuanfeng, and its currency spectrum is marked as Grade 4, and the price is 3,000 yuan, which is quite precious and has high collection value. 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.