供应链金融模式图

+-------------------+       +-------------------+       +-------------------+
|   核心企业        |<----->|   上下游企业      |<----->|   金融机构        |
+-------------------+       +-------------------+       +-------------------+
        |                           |                           |
        v                           v                           v
+-------------------+       +-------------------+       +-------------------+
|   应收账款融资    |       |   库存融资        |       |   预付款融资      |
+-------------------+       +-------------------+       +-------------------+

class SupplyChainFinance:
    def __init__(self, core_enterprise, upstream_enterprise, financial_institution):
        self.core_enterprise = core_enterprise
        self.upstream_enterprise = upstream_enterprise
        self.financial_institution = financial_institution

    def accounts_receivable_financing(self, amount):
        if self.core_enterprise.verify_receivable(amount):
            self.financial_institution.provide_loan(amount)
            self.upstream_enterprise.receive_loan(amount)
            return "融资成功"
        else:
            return "融资失败"

# 示例调用
core_enterprise = CoreEnterprise()
upstream_enterprise = UpstreamEnterprise()
financial_institution = FinancialInstitution()

scf = SupplyChainFinance(core_enterprise, upstream_enterprise, financial_institution)
result = scf.accounts_receivable_financing(1000000)
print(result)  # 输出：融资成功