The e under the seal in calligraphy signature is called seal. Seal is the seal symbol on ancient Chinese official documents, calligraphy, paintings, and books. It commonly means "sealing". It is the last critical step when works such as calligraphy and painting are about to be completed. This is a unique and characteristic art in China. Most of the seals are name, Zhaiguan, seal, leisure seal, etc. Therefore, the e under the seal in calligraphy signature is called seal.