Automatic Ticket Order Submission Feature in China Railway 12306: Design and Operational Insights

On December 30, China Railway announced a pilot of the “system automatic ticket order submission” feature for long‑distance tickets between major cities and Sichuan/Chongqing, running from Dec 30 2024 to Feb 8 2025.

Users can pre‑fill travel dates within the Spring Festival period (Jan 14‑Feb 22 2025) and select up to one date with a maximum of 60 train trips per order, keep up to six pending orders, each for up to nine passengers.

Sixteen days before departure, 12306 notifies users to adjust priorities and optionally pre‑pay the highest fare; fifteen days before, the system automatically submits pre‑paid orders according to priority, while other orders join the queue by submission time.

Successful purchases refund any excess pre‑payment; failures receive full refunds. Users who do not pre‑pay can still submit manually at release.

The author illustrates the workflow with a personal example traveling from Shanghai to Chengdu on Jan 20 2025, showing how the feature replaces manual “alarm‑clock” ticket grabbing.

From a technical perspective, the new function must handle high concurrency, scalability, task priority sorting, pre‑payment and refund management, real‑time notifications, and fairness between automatic and manual orders.

A possible implementation involves placing manual purchase tasks into a message queue, while the automatic feature creates scheduled tasks that enqueue orders at release time, optionally pre‑creating and sorting tasks in a database.

Because the system already endures massive Spring Festival traffic, the feature is being rolled out as a gray‑scale pilot to mitigate risk before a nationwide launch.