论不当得利制度的适用及完善
The Application and Improvement of Unjust Enrichment System

不当得利是债法体系的一项关键制度，自《民法典》通过后，关于不当得利的规定趋于成熟，但仍有不足之处。特别是关于不当得利返还请求权的规定亟待细化，以充分保护债权人与债务人的利益。本文以《民法典》中关于不当得利的规定为基础，对不当得利的证明责任分配及不当得利返还请求权与其他请求权的关系等相关问题进行探讨。后者在我国有两种观点，竞合说与辅助说，笔者认为竞合说更适合我国的司法实践，也为债权人自由选择救济权益提供了更多空间。
Unjust enrichment is a key system in the debt law system. Since the adoption of the Civil Code, the provisions on unjust enrichment have become mature. But there are still shortcomings. Especially when it comes to the right of claim for restitution of unjust enrichment, the provisions need to be refined to fully protect the interests of creditors and debtors. Based on the discussion of the provisions on unjust enrichment in Civil Code, this paper discusses the claim for the return of unjust enrichment. It mainly focuses on the distribution of proof of unjust enrichment and the relationship between the right of claim for restitution of unjust enrichment and other rights of claim. The latter has two views in Chinese academic circles—concurrence theory and auxiliary theory. The author thinks that the theory of concurrence is more suitable for Chinese judicial practice, and it also provides more space for creditors to freely choose to remedy their legitimate rights and interests.