Search "China Press and Publication Information Network" through the portal website to find the webpage of China Press and Publication Information Network; Click "CIP Center" and "CIP Verification" will appear. Fill in the "verification code" of the CIP data core number (4 digits in the year, usually 5 or 6 digits) you want to verify, and click "Verify".

If you want to inquire about the copyright number and filing situation of the book Four Ridges Bean, search "China Press and Publication Information Network" from Baidu portal to inquire about the CIP data of the book, as follows: China Press and Publication Information Network, click "CIP Center" and enter "CIP Data Heizi (2005) No.094609 of China Map Library". Check your location as follows: Home-> Data service-> CIP kernel font size verification.

China Map Library is the only library in China responsible for collecting, sorting out and managing national publication samples since the founding of New China, and it is also the most complete and authoritative publication resource information base in contemporary China.

By the end of April, 2005, Version Library had collected more than ten thousand kinds of books, magazines, newspapers and various audio-visual products 1 10,000.