Quan guo bao kan suo yin shu ju ku 1857-1992 The electronic version of the National Index to Chinese Newspapers and Periodicals was first created in 1993. Now, it has become a super index database covering information for over one and a half centuries from 1833 to the present. It lists about 40,000 kinds of newspapers and periodicals published in China. The database contains over 40 million entries, with a yearly update of 3.5 million entries.