China Academic Journals Full-text Database is the largest academic journal full-text database in the world, updated continuously. It collects over 7000 academic journals published in China, including nearly 2700 titles of core journals and journals collected by significant evaluation databases. The content covers natural science, engineering and technology, agriculture, philosophy, medicine, social science and so on. By November 1st, 2018, the total article amount is more than 54 million. The database comprises 10 series (A to J): science/technology/engineering (ABC), agriculture (D), medicine/hygiene (E), literature/history/philosophy (F), politics/military/law (G), education/social science(H), electronics/information technology(I), economics and management (J). The 10 series are further divided into 168 subjects and then 3600 sub-subjects.