[
  {
    "id": 900001,
    "paramtype": "ITEM_CREATE_PARAM_LETTER",
    "paramstr": "1,2,3"
  },
  {
    "id": 900004,
    "paramtype": "ITEM_CREATE_PARAM_LETTER",
    "paramstr": "4,5,6,7"
  },
  {
    "id": 900008,
    "paramtype": "ITEM_CREATE_PARAM_LETTER",
    "paramstr": "4,5,6,7,8,9"
  },
  {
    "id": 900009,
    "paramtype": "ITEM_CREATE_PARAM_LETTER",
    "paramstr": "1,2,3"
  }
]