Check the weight. Commonly used duplicate checking tools and methods include China Knowledge Network, Turnitin, CrossRef and self-help duplicate checking.

1, China HowNet: China HowNet is the main part of China's knowledge resource database, and also a well-known literature retrieval and download platform in China. On China HowNet, you can use the "duplicate checking system" to check the duplicates of papers.

2.Turnitin:Turnitin is an internationally renowned duplicate checking tool for academic papers, and its duplicate checking results have high accuracy. It can be registered and used in official website.

3.CrossRef:CrossRef is an internationally renowned academic document exchange platform, and its search engine can query documents.

4. Self-help duplicate checking: In addition to using professional duplicate checking tools, the applicant can also self-check the duplicate application form. You can use some commonly used literature retrieval tools, such as Baidu Academic, Google Academic, etc., to retrieve and compare the literature in related research fields, so as to ensure the originality and academic integrity of the application.