文档字段描述：

发货模式，发货模式枚举值：1、UNIFIED_DELIVERY（统一发货）2、SPLIT_DELIVERY（分拆发货） 示例值: UNIFIED_DELIVERY。

请求示例中：

{
    "order_key": {
        "order_number_type": 2,
        "transaction_id": "fake-transid-20221214190427-1"
    },
    "delivery_mode": 1,
    "logistics_type": 1,
    "shipping_list": [
        {
            "tracking_no": "fake-trackingno-2022121419042711",
            "express_company": "STO",
            "item_desc": "微信气泡狗集线器*1",
            "contact": {
                "consignor_contact": "+86-177****1234"
            }
        }
    ],
    "upload_time": "2022-12-15T13:29:35.120+08:00",
    "payer": {
        "openid": "ogqztkPsejM9MQAFfwCQSCi4oNg3"
    }
}文档不清晰