When the whistle sounded, Tang Yu, holding Xia Shihan and Xiang Xingwei, took the fat girl's hand and slid down steeply with great speed. After all, it was real snow, not man-made snow, and soon slid to the bottom of U-shaped. With strong inertia, he rushed up again, because the U-shaped on both sides was not symmetrical. When sliding up, the U-shaped slideway was nearly half short. The downward momentum is not exhausted. Almost half of the powerful forces are used to throw themselves into the sky, with enough energy to make various positions and then land. The runway is scientifically calculated, so long as you are skilled, you can...