Antique treasure fire lacquer seal, the use of fire lacquer seal has a long history, at least in the Middle Ages. From the 16th century to the end of the 19th century, people rarely used envelopes after writing letters, but folded the stationery, dotted the seal with red or black wax, and stamped the wax with a coat of arms representing the writer or a seal with the initials of their own name.
This step is very important for both a gentleman in a position of authority and a lady waiting for a letter, so that the letter will not be opened by unrelated persons before it is handed over to the recipient, and it is also a necessary step before sending a secret letter.
It’s too sophisticated.