{
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    {
      "id": "P1",
      "name": "风禾监测站",
      "type": "product"
    },
    {
      "id": "P2",
      "name": "温度单元",
      "type": "part"
    },
    {
      "id": "P3",
      "name": "湿度单元",
      "type": "part"
    },
    {
      "id": "S1",
      "name": "青禾部件社",
      "type": "supplier"
    },
    {
      "id": "S2",
      "name": "湖光部件社",
      "type": "supplier"
    },
    {
      "id": "P4",
      "name": "电源模块",
      "type": "part"
    }
  ],
  "edges": [
    {
      "from": "P2",
      "to": "P1",
      "type": "part_of"
    },
    {
      "from": "P3",
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      "type": "part_of"
    },
    {
      "from": "P4",
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    },
    {
      "from": "S1",
      "to": "P2",
      "type": "supplies"
    },
    {
      "from": "S2",
      "to": "P3",
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    }
  ]
}