{
  "agreement": {
    "id": "RCEP",
    "version": "2026.1",
    "effective_date": "2026-01-01",
    "members": ["CN", "JP"],
    "accumulation": "regional"
  },
  "products": [
    {
      "id": "phone",
      "code": "8517.13",
      "value_units": 10000,
      "origin": "originating",
      "region": "CN"
    }
  ],
  "materials": [
    {
      "id": "chip",
      "code": "8542.31",
      "quantity": 1,
      "value_units": 4000,
      "origin": "originating",
      "region": "JP"
    }
  ],
  "edges": [
    { "parent": "phone", "child": "chip", "quantity": 1, "value_units": 4000 }
  ],
  "processes": [],
  "rules": [
    {
      "kind": "cts",
      "id": "phone-cts",
      "threshold_basis_points": 0,
      "formula": "build_down",
      "required_kinds": [],
      "required_region": "",
      "forbidden_kinds": []
    }
  ]
}