In fact, A refers to the first author, who is only the main participant of the project after the correspondent. Most of his contributions are practical performers such as experimental operations, generally referring to the students of correspondents.

B actually refers to the second author, and refers to the secondary participants and general participants except the communication author and the first author.

The biggest difference between them is the level of copyright. The works of the first author are more valuable than those of the second author. Some magazines require Arabic numerals, namely 1, 2, 3 and so on.

The EI paper is written in English, and the basic information such as the author's name, unit and serial number, city and postcode, and identity title should be clearly marked to avoid omission and damage to the author's rights and interests.