Because SCI is divided into four areas, the first area has the greatest academic value, so the most significant difference between the articles in the first area and the articles in the second area is that the articles in the first area are more difficult to write and publish. As far as the domestic situation is concerned, there are fewer authors who can publish papers in the first field, and there are relatively many in the second field.
The first regional periodical is the top periodical in this discipline.
First-class journals are the top journals in various disciplines in the world, which can be said to be the best in the world. It is naturally very difficult to publish such periodicals, but many domestic authors still lack the ability to write in English. It seems too difficult for ordinary authors to publish articles in one field, but some experts and scholars can still publish them.
For ordinary authors, more people choose to publish periodicals in the second district. First, it is not so difficult to publish periodicals in the second district. Second, many graduation or promotion requirements explicitly require the publication of periodicals in the second district and above.
Therefore, the periodicals in the second district are highly recognized in China, and some universities or scientific research units in other three districts and four districts may not recognize them, but they are also recognized, and different units have different requirements.