A statistical report on China's paper cash incentive policy in recent 20 years was recently released. According to the policy of some universities, the author can get a maximum prize of $6.5438+0.65 million for publishing a paper in a natural or scientific journal. It is worth mentioning that more schools are unknown because there is no public reward policy and are not included in the research sample. The object of this study is the cash reward policy for natural science papers, excluding social science papers.