Here we are at the man - made heavenly river , the Red Flag Canal.

韩佳:我们现在是在人工天河,红旗渠畔.

The world largest construction difficulty pont du gard: the red flag canal

世界上施工难度最大的引水渠：红旗渠

The Red Flag Canal is like a green ribbon which winds through the Taihang mountains.

红旗渠就像一条绿色的飘带缠绕在太行山间.