Key points
- The Single Window concept comes from Recommendation No. 33 of the United Nations Centre for Trade Facilitation and Electronic Business (UN/CEFACT). Its essence is “submit once, share across agencies, receive one consolidated response”.
- The China International Trade Single Window is built under the lead of the national port administration authorities. It covers goods declarations, manifests, means of transport, licences and permits, certificates of origin, processing trade and export tax refunds, among other applications.
- Companies can key data in through the web portal, or send it from their own systems via data exchange and receive receipts the same way.
In practice
For trading companies, the most common use of the Single Window is filing customs declarations. The customs specialist, or an appointed customs broker, enters or imports the declaration in the Single Window, signs it with the E-Port identity credential and submits it to customs. Results such as review, release and inspection come back as receipts, and the company updates the declaration status and records the customs declaration number accordingly.
High-volume companies usually stop keying declarations into the portal one by one and have their business systems generate declaration data that conforms to the message specifications. The hard parts are keeping declaration data consistent with contracts, invoices and packing lists; handling receipts that arrive late or out of order, so that status only ever moves forward and duplicate messages are not processed twice; and tracing a failed or rejected filing back to the specific field at fault.
The Single Window only solves the problem of submitting data to the authorities. Where the declaration data comes from, whether it matches the business documents and whether it reconciles with tax refunds and foreign exchange receipts still depend on the company’s internal systems.
How Tranexio supports it
Tranexio derives customs declarations from packing lists and checks data consistency before filing. It provides a standard Single Window connector via the integration hub for message filing and receipt processing; receipts are synchronised idempotently, status only moves forward, and the customs declaration number is written back automatically. See Customs and the Single Window.