1, China Knowledge Network (CNKI): There is a saying, if you don't check the ignorance network, you must check it if you have CNKI. CNKI is a national paper duplicate checking system. Many colleges and universities use their own duplicate checking system to check duplicates, and the duplicate checking entrance can only be accessed by their own system, but not by the external network.

2. Wanfang database: contains a large number of Chinese literature data. Compared with HowNet, the duplicate checking rate is lower and it is more suitable for academic research.

3. VIP periodical network: Compared with HowNet, the duplicate checking rate is higher, which can prevent plagiarism to some extent.

4.cnkitime: For undergraduate version (final graduation thesis of junior college/undergraduate), postgraduate version (final graduation thesis of master) and periodical title version (periodical submission and title evaluation), you can check the number of articles for free.

It is suggested that you choose a suitable paper duplicate checking website according to your own needs and situation.