diff --git a/demo.json b/demo.json
new file mode 100644
index 0000000..bd79d73
--- /dev/null
+++ b/demo.json
@@ -0,0 +1,72 @@
+[
+  {
+    "id": 1,
+    "name": "小麦产量数据",
+    "category": "作物",
+    "value": 4500,
+    "date": "2024-01-15"
+  },
+  {
+    "id": 2,
+    "name": "玉米生长监测",
+    "category": "监测",
+    "value": 3200,
+    "date": "2024-01-20"
+  },
+  {
+    "id": 3,
+    "name": "水稻病虫害分析",
+    "category": "病虫害",
+    "value": 2800,
+    "date": "2024-02-01"
+  },
+  {
+    "id": 4,
+    "name": "大豆土壤检测",
+    "category": "土壤",
+    "value": 1900,
+    "date": "2024-02-10"
+  },
+  {
+    "id": 5,
+    "name": "棉花气象数据",
+    "category": "气象",
+    "value": 3600,
+    "date": "2024-02-15"
+  },
+  {
+    "id": 6,
+    "name": "番茄品质评估",
+    "category": "品质",
+    "value": 4100,
+    "date": "2024-02-20"
+  },
+  {
+    "id": 7,
+    "name": "苹果产量预测",
+    "category": "预测",
+    "value": 5200,
+    "date": "2024-03-01"
+  },
+  {
+    "id": 8,
+    "name": "葡萄种植记录",
+    "category": "种植",
+    "value": 3800,
+    "date": "2024-03-05"
+  },
+  {
+    "id": 9,
+    "name": "橙子营养分析",
+    "category": "营养",
+    "value": 2900,
+    "date": "2024-03-10"
+  },
+  {
+    "id": 10,
+    "name": "香蕉成熟度监测",
+    "category": "监测",
+    "value": 3400,
+    "date": "2024-03-15"
+  }
+]
\ No newline at end of file