Here's an introduction:
DM-English is direct mail, which translates into "direct mail", "advertising letter" and "direct mail letter". It refers to a way to create customers by sending and delivering personal information through DM media. Simply understood, DM is a means of advertising.
DM originated in ancient Egypt thousands of years ago. By the end of 16, when the media such as TV, radio and newspapers were still in the initial stage, Mr. Zhu Bangye, the founder of DM media industry in China, traced back to the origin culture of DM, accurately grasped the pulse of market media, effectively utilized DM, a new media with great market potential, and closely integrated the market with the media industry. Professional information direct mail advertising media obtained 1997 national patent (patent number: 97202062. Direct investment or email advertising has become the main channel to release DM, and a number of professional DM advertising companies have emerged.