Pearl River Delta Metropolitan Region intercity railway

The Pearl River Delta Metropolitan Region Intercity Railway System (Chinese: 珠江三角洲地區城際軌道交通, abbreviated as PRDIR) is a regional higher-speed rail and suburban rail network being gradually constructed in the Pearl River Delta (Guangdong–Hong Kong–Macao Greater Bay Area), People's Republic of China. The project's goal is to have every major urban center in the Greater Bay Area to be within one-hour travel by rail to Guangzhou.

Source: Wikipedia — Pearl River Delta Metropolitan Region intercity railway (CC BY-SA 4.0)