A good name for an underground railway locomotive.

1, reflecting its characteristics: underground track locomotive is a special means of transportation, its main feature is that it runs underground and relies on the track for guidance. So this feature can be reflected in the name, such as "underground iron dragon" and "tunnel shuttle".

2. Poetic or moral: Giving the underground railway locomotive a poetic or moral name can make it more attractive. For example, Mineral Waterfall and Wings of Wujin are beautiful and meaningful.

3. Regional cultural characteristics: If the subway locomotive is located in a place with distinctive regional culture, it can be considered to reflect its cultural characteristics in its name. For example, if the area is a coal-producing area, you can consider using names such as "Coal Sea Star" and "Black Gold Express".

4, concise and easy to remember: nice names should be concise and easy to remember, so that people can remember them as soon as they listen. Therefore, this factor can be considered when choosing a name, such as "Mine Road Overlord" and "Wujin Express".