What is plum blossom seal?

Plum blossom seal, shaped like plum blossom, hence the name. ?

Historically, "Plum Blossom Seal" experienced ups and downs in Shang, Han, Tang, Song, Yuan, Ming and Qing Dynasties. As early as Shang dynasty, ancient pottery was engraved with plum hieroglyphics. In the Han dynasty, plum blossom seal script became a good collection. Its characteristics are "look at flowers from a distance, look at characters from a distance, there are words in flowers, there are flowers in words, flowers and characters are integrated, and the font is strong". The ancient people's habit of loving plum blossom and worshiping Chinese characters endowed "Plum Blossom Seal" with vigorous and elegant cultural connotation, and also made it a living fossil for studying ancient calligraphy in China.