{
  "snapshot_date": "2026-08-24",
  "fx_cny_per_usd": 6.7817,
  "hours_per_month": 730,
  "base_life_months": 60,
  "capital_cost_annual": 0.08,
  "compute_server": {
    "key": "dell_r7625_fleet_equivalent",
    "description": "DHH-like dual EPYC 9454 compute node",
    "acquisition_cny": 169542.5,
    "vcpu": 192,
    "memory_gib": 384,
    "local_storage_gib": 19200,
    "rack_u": 2,
    "avg_watts": 497,
    "retail_colo_cny_month": 700,
    "source_note": "37signals fleet and Dell/SPECpower validation; acquisition is USD 500k / 20 nodes"
  },
  "database_server": {
    "key": "inspur_nf5476g7_db_node",
    "description": "Inspur NF5476G7 database node, 2x24-core, 512 GiB, 3x3.2 TB NVMe",
    "acquisition_cny": 147000,
    "vcpu": 96,
    "memory_gib": 512,
    "local_storage_gib": 9600,
    "rack_u": 4,
    "avg_watts": 750,
    "retail_colo_cny_month": 1000,
    "source_note": "Current reseller quote with 3-year vendor warranty; power is a conservative model input"
  },
  "storage_nodes": [
    {
      "key": "2u12_value",
      "description": "2U 12-drive value node",
      "chassis_cny": 45000,
      "drive_count": 12,
      "drive_gb": 18000,
      "drive_cny": 3200,
      "rack_u": 2,
      "avg_watts": 300,
      "source_note": "Estimated chassis anchored to public 2U enterprise-server transactions; 2025 drive quote",
      "acquisition_cny": 83400,
      "raw_gb": 216000
    },
    {
      "key": "4u36_enterprise",
      "description": "4U 36-drive enterprise node",
      "chassis_cny": 80000,
      "drive_count": 36,
      "drive_gb": 18000,
      "drive_cny": 3200,
      "rack_u": 4,
      "avg_watts": 480,
      "source_note": "Conservative current enterprise chassis assumption; 2025 drive quote",
      "acquisition_cny": 195200,
      "raw_gb": 648000
    },
    {
      "key": "4u60_inspur",
      "description": "4U 60-drive Inspur-class enterprise node",
      "chassis_cny": 147000,
      "drive_count": 60,
      "drive_gb": 18000,
      "drive_cny": 3200,
      "rack_u": 4,
      "avg_watts": 650,
      "source_note": "Inspur NF5476G7 configured quote plus 60 x 18 TB government transaction price",
      "acquisition_cny": 339000,
      "raw_gb": 1080000
    }
  ],
  "compute_target_utilization": 0.7,
  "database_target_utilization": 0.7,
  "object_ec_efficiency": 0.75,
  "object_target_fill": 0.8,
  "object_monthly_change_rate": 0.05,
  "volume_discount_schedule_assumption": {
    "1-4": 1.0,
    "5-19": 0.98,
    "20-99": 0.95,
    "100-999": 0.9,
    "1000+": 0.85
  }
}