The mark consists of an incomplete circle containing a train on a bridge traveling over water with a mountain range in the background and a portion of a guardrail and sidewalk in the foreground. Beneath the design is Chinese lettering, beneath which is the wording "Sea Dyke" in stylized font.
The transliteration of the non-Latin characters in the mark is: HAI DI.
The first Chinese character means "SEA", the second Chinese character means "DYKE" and the combination of the two characters means "SEAWALL".