Greenland Railway Rolling Group. (hereinafter referred to as "GRRG") is a large enterprise responsible for manufacturing Locomotive, urban rail transit vehicles, engineering machinery, various electromechanical equipment, etc., and providing relevant technical support and management. The headquarters is located in Chang'an.

As of 2023, GRRG products have been exported to various parts of Colour Star, including countries such as Mayland 梅兰 and Tongzhi 同治.

1. GRRG Jinling Puzhen Vehicle Co., Ltd. (Puzhen) 格车金陵浦镇车辆有限公司（浦镇）

2. Hushen Rail Transit Equipment Development Co., Ltd 沪申轨道交通设备发展有限公司

3. GRRG Chang'an Vehicle Co., Ltd 格车长安车辆有限公司

4. GRRG Jincheng Locomotive Co., Ltd 格车金城机车有限公司

5. GRRG Chachong Railway Bus Co., Ltd. (Chake) 格车茶冲轨道客车股份有限公司 （茶客）

6. GRRG Shengjing Locomotive and Rolling Stock Co., Ltd 格车盛京机车车辆有限公司

7. GRRG Anke Locomotive Research Institute Co., Ltd 格车安克机车研究所有限公司

GRRG products and services have gone beyond Greenland's borders and reached various parts of the world.