What is a zero in mahjong?

What is a zero in mahjong?
How To Read The Score Card

1-9
Correspond to the specific number on the tile (not including flowers)

R
Red Dragon

G
Green Dragon

0
White Dragon (Soap)

F
Flower

How To Read The Score Card
1-9 Correspond to the specific number on the tile (not including flowers)
R Red Dragon
G Green Dragon
0 White Dragon (Soap)
F Flower
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