黑马 (hēi mǎ): Dark horse (Noun) — Meaning & Stroke Order

This political dark horse, relying on its unique platform, made a sudden and remarkable rise in the election.

Which team do you predict will become the biggest dark horse in this entrepreneurship competition?

In the competition, he was a dark horse and won the championship.

Although they are not favored, we absolutely cannot conclude from this that they won't be a dark horse.