测试数据生成

[
  {
    "id": 1,
    "name": "Bob",
    "age": 34,
    "city": "Nanjing"
  },
  {
    "id": 2,
    "name": "Charlie",
    "age": 46,
    "city": "Chengdu"
  },
  {
    "id": 3,
    "name": "Bob",
    "age": 42,
    "city": "Nanjing"
  },
  {
    "id": 4,
    "name": "George",
    "age": 33,
    "city": "Nanjing"
  },
  {
    "id": 5,
    "name": "Hana",
    "age": 44,
    "city": "Chengdu"
  },
  {
    "id": 6,
    "name": "Daisy",
    "age": 18,
    "city": "Nanjing"
  },
  {
    "id": 7,
    "name": "Alice",
    "age": 31,
    "city": "Hangzhou"
  },
  {
    "id": 8,
    "name": "Ethan",
    "age": 34,
    "city": "Beijing"
  },
  {
    "id": 9,
    "name": "Charlie",
    "age": 19,
    "city": "Nanjing"
  },
  {
    "id": 10,
    "name": "Ethan",
    "age": 21,
    "city": "Shanghai"
  }
]