A tile is flipped at the start of a hand, known as a Dora lndicator, and its succeeding tile is known as a Dora. Each Dora adds 1 Han to the winning hand, and no Han if a hand doesn't win.

Dora

A tile is flipped at the start of a hand, known as a Dora lndicator, and its succeeding tile is known as a Dora.

What is Dora?