item_fee - 获得1688商品快递费用

item_fee - 获得1688商品快递费用

测试网址：注册送淘宝/天猫商品详情接口

Result Object:
---------------------------------------
{
    "item": {
        "num_iid": "534409796654",
        "area_id": "2274",
        "location": null,
        "shipping_to": "新余",
        "express_fee": "",
        "ems_fee": "",
        "post_fee": "",
        "freightTemplateId": null,
        "price": null,
        "beginAmount": null,
        "unitWeight": null,
        "memberId": null
    },
    "error": "data error,no cache",
    "reason": "data error,no cache",
    "error_code": "5000",
    "cache": 0,
    "api_info": "today: max:",
    "execution_time": 0.2,
    "server_time": "Beijing/2020-07-05 09:50:01",
    "call_args": {
        "num_iid": "534409796654",
        "area_id": "2274"
    },
    "api_type": "1688",
    "translate_language": "zh-CN",
    "translate_engine": "google_cn",
    "request_id": "15f0131c8deff8"
}