Legal analysis: you can sue the owner for paying the maintenance fund. Unjust enrichment refers to obtaining benefits at the expense of others without legal basis. After the legal fact of unjust enrichment occurs, there is a relationship of rights and obligations between unjust enrichment and stakeholders, that is, stakeholders have the right to request unjust enrichment to return unjust enrichment, and unjust enrichment has the obligation to return it.

Legal basis: Article 120 of the Civil Law of People's Republic of China (PRC) infringes, and the infringed has the right to request the infringer to bear the tort liability.

Article 121 Where there is no legal obligation or agreed obligation, the person who suffers losses in order to avoid the interests of others has the right to demand the beneficiary to repay the necessary expenses paid for it.

Article 122 If another person obtains improper benefits without legal basis, the person who has suffered losses shall have the right to ask him to return the improper benefits.