As the Guangdong-Hong Kong-Macao Greater Bay Area speeds up building the metropolitan circle, transportation plays a more significant role than before in cross-city communication.

Workers check CRH trains at the workshop of CRRC Guangdong Co Ltd in Jiangmen, South China's Guangdong province, on April 18, 2021. [Photo by Chinadaily]

CRRC Guangdong Co Ltd in Jiangmen, South China's Guangdong province, is devoted to railway construction, producing both bullet and metro trains, including vehicles for MTR in Hong Hong and subways in Shenzhen.