Introduction to the first turn: The twenty-four turns start from Dashuigou and hover on the slope between Qinglong Mountain and Mopan Mountain. The total length is 4 kilometers. The effective road width is about 6 meters. The straight-line distance between the first turn and the 24th turn at the top of the mountain is about 350 meters, the vertical height is about 250 meters, and the slope angle is about 60 degrees. It takes about 8 minutes to climb the 24th turn by driving a car from bottom to top. It takes about 6 minutes from top to bottom.