The mainland stretch of the Guangzhou-Shenzhen-Hong Kong Express Rail Link (XRL) will have access to a fully-functional 5G service before the Spring Festival, according to a joint announcement between Guangdong Mobile, Guangzhou Railway Group and Huawei, Xinhua News Agency reported on Tuesday.

The announcement came days after plans outlining deployment of the next-generation mobile system on the whole line, to speed up the development of the Great Bay Area.

The 141 km Guangzhou-Shenzhen-Hong Kong Express Rail Link includes a 115 km track on the Chinese mainland and 26 km in Hong Kong.

Guangdong Mobile will invest 150 million yuan ($20.9 million) to lay out more than 300 signal transmission points along the mainland section. The super fast 5G mobile service will provide intelligent and accurate train control, as well as ensure passengers' safety.