CSR and CNR were originally two famous rail transit equipment manufacturers in China, namely China Southern Locomotive and Rolling Stock Industry Group Corporation (hereinafter referred to as CSR) and China Northern Locomotive and Rolling Stock Industry Group Corporation (hereinafter referred to as CNR). 20 15 The two companies merged to form CRRC Corporation. So geographically, CSR and CNR do not refer to a specific city, but are distributed in many areas of China.

Headquartered in Beijing, China South Locomotive Group has subsidiaries and production bases in several cities in China, such as Qingdao, Nanjing, Changzhou and Xi 'an.

Headquartered in Beijing, CNR also has many subsidiaries and production bases in different cities in China, such as Changchun, Tangshan, Shijiazhuang and Dalian.

In a word, China South Locomotive and CNR, as the first two enterprises, have a wide range of business, with production bases and R&D centers in many cities in China.