The condition of arch clamping is that the sky is dry, there is no impact, the ground branches are square or square, and the middle position is vacant, so that an arch can be formed. For example, the ugly days have passed, the sky is dry, the ground branches are ugly, the sky is dry, the ground branches are unfinished, and the ugly arches are ugly. It's called arch landing. Other clip arches, and so on.
Taboo, as mentioned above, the Universiade meets the child, which is called compensation. These five years have not been smooth and unlucky.