The z 186 train passes through Shenzhen, Dongguan East, Huizhou, Heyuan, Longchuan, Ganzhou, Ji 'an, Nanchang West, Jiujiang, Macheng, Fuyang, Bozhou, Shangqiu South, Heze, Liaocheng, Hengshui, Bazhou, Tianjin, Tangshan, Shanhaiguan, Jinzhou, Goubangzi, Panjin, Haicheng and Anshan.

After 1999, some AC drive locomotives appeared one after another. The successful ones are Dongfeng 4DJ of Dalian factory and Dongfeng 8CJ of Qishuyan factory. Domestic electric locomotives are all called Dongfeng * type, and imported ones are ND* type. The most famous electric locomotives in China are Dongfeng 1 1G and Dongfeng 8B manufactured by Qishuyan Locomotive and Rolling Stock Factory.

Locomotive composition:

Diesel locomotive is a locomotive powered by internal combustion engine.

Note: Most internal combustion engines used in railway locomotives are diesel engines.

Diesel locomotive consists of the following parts: diesel engine, main transmission device, auxiliary transmission device, car body (including cab), running gear and various auxiliary systems.

Locomotive auxiliary system includes: fuel system, engine oil system, cooling water system, preheating system, air braking system and other air systems, control system, lighting system, charging system, detection system, diagnosis system and display and recording system.