EI (Engineering Index) is a global database, which mainly contains important documents in the field of engineering technology, including periodicals and conference documents, as well as some scientific and technological reports and monographs. There are three types of EI collections: EI core collections, non-core collections (Pageone collections) and conference papers.

EI is called the global core and recognized by every country. In China, some units reward 3,000 to 8,000 yuan for publishing an EI retrieval paper. Generally used for: evaluation of masters, doctors, associate professors and professors. After the papers published by the author in international conferences or magazines are included in EI, some domestic authorities can issue EI inclusion certificates to the author.

The difference between JA and CA:

EI mainly includes important documents in the field of engineering technology, including periodicals and conference documents, as well as some scientific and technological reports and monographs. There are three types of EI collections: EI core collections, non-core collections (Pageone collections) and conference papers. ?

Since 2009, there is no difference between core retrieval and non-core retrieval, both of which are core retrieval. But it is also divided into periodical retrieval and conference retrieval. Namely JA type of source periodical and CA type of conference. In the professional title evaluation and the annual award of the school science and technology department, only the articles included in the EI core (EI CD version) are recognized.

Refer to the above? Baidu Encyclopedia -EI Retrieval Periodicals