{
  "schema_version": 1,
  "items": [
    {
      "variety_code": "tomato",
      "variety_name": "西红柿",
      "biz_date": "2026-04-23",
      "avg_price_yuan_per_kg": 4.35,
      "market_code": "DEMO_MARKET",
      "unit": "yuan_per_kg"
    },
    {
      "variety_code": "cucumber",
      "variety_name": "黄瓜",
      "biz_date": "2026-04-23",
      "avg_price_yuan_per_kg": 2.95,
      "market_code": "DEMO_MARKET",
      "unit": "yuan_per_kg"
    }
  ]
}