出单双出现规的公式简介：Seven miles out of the city, there is a hillside full of plum trees, with a clear stream surrounding it at the foot of the hillside. When the plum blossoms are in full bloom, they will cover the mountain stream, hence the name.
Seven miles out of the city, there is a hillside full of plum trees, with a clear stream surrounding it at the foot of the hillside. When the plum blossoms are in full bloom, they will cover the mountain stream, hence the name.
