{
  "customers": [
    {
      "id": "C01",
      "key": "lake-01",
      "name": "湖岸实验室"
    },
    {
      "id": "C02",
      "key": "qing-01",
      "name": "青禾学校"
    },
    {
      "id": "C03",
      "key": "qing-02",
      "name": "青禾学校"
    },
    {
      "id": "C04",
      "key": "star-01",
      "name": "星野社"
    }
  ],
  "orders": [
    {
      "id": "O01",
      "customer_id": "C01",
      "amount_yuan": 120
    },
    {
      "id": "O02",
      "customer_id": "C01",
      "amount_yuan": 80
    },
    {
      "id": "O03",
      "customer_id": "C02",
      "amount_yuan": 65
    },
    {
      "id": "O04",
      "customer_id": "C03",
      "amount_yuan": 90
    },
    {
      "id": "O05",
      "customer_id": "C01",
      "amount_yuan": 40
    },
    {
      "id": "O06",
      "customer_id": "C04",
      "amount_yuan": 50
    },
    {
      "id": "O07",
      "customer_id": "C02",
      "amount_yuan": 35
    },
    {
      "id": "O08",
      "customer_id": "C04",
      "amount_yuan": 20
    }
  ],
  "total_yuan": 600
}