China: Wireless Double-Heading Coupling System Introduced at Nanning Depot

A new close-range wireless double-heading coupling system has been deployed on 148 HXD1C locomotives at the Nanning depot in southern China.

The system is the result of joint development by China Railway Nanning Group and CRRC, and is intended to streamline the coupling process and support more flexible locomotive operations along the Nanning–Kunming Railway.

On this line, gradients vary significantly. Freight trains typically operate with a single HXD1C locomotive between Nanning South and Baise. However, between Baise and Kunming, two locomotives are required. Until recently, train crews were responsible for manually coupling and decoupling locomotives at Baise Station, a process that involved additional time and labour.

The new system aims to reduce manual intervention and support streamlined operations. It enables automatic coupling between two locomotives in approximately five seconds using a wireless connection. Core functions include automatic locomotive identification and synchronous control. It also allows for 6A data exchange and supports the operation of helper locomotives without crew onboard.

Designed to support various operating conditions, the system enables stable control of double-heading locomotives. Its adoption is expected to support ongoing freight operations across the New International Land-Sea Trade Corridor by improving locomotive coordination and reducing operational delays.