What is a single double shaw?

Double Xiao in the zodiac refers to the fact that in the zodiac, the strokes of Chinese characters belonging to the zodiac are even, and all even zodiac characters are called double Xiao, including cattle, tigers, rabbits, horses, sheep, monkeys and dogs. At the same time, there is Xiaoshan, which means that all Chinese characters in the zodiac are singular, such as mouse, dragon, snake, chicken and pig.