Lost items on the high-speed rail can be retrieved through official website 12306. The specific method is as follows:

Tool/Version: Huawei P40, HarmonyOS2.0,12306app 5.6.0.8 Edition.

1. Open the Railway 12306App and click the "My" option.

2. In the warm service, click "Lost Items".

3. Register on the lost property registration page and fill in the lost property information completely.

4. You can also recruit by checking the number of trains. Enter the relevant train number and time, and click Query Now.

5. On the inquiry page, you can see the item number, delivery date and item category. Click on the related items to view the information of the lost items, including the item category, temporary storage station, item content, collection place and collection time. If you have any lost items, please click to collect them. After completing the above operations, the staff will contact you within 6 hours.