Ask a connection method is not done, the hole is not concave and convex, there is no anti-skid function, there is no fixed position fixed with the ground, and there is no way to ensure that animals do not settle in the pipeline, how did this win the prize,,,,,,,,,,,,,,,,,,,

What if the animal stays in the hole for a long time?

The supporting wall in the life passage can be designed to be narrow on both sides and wide in the middle, like this "() passage ()" (top view)

A fan

What if the snail climbs up?

Great

Have a heart

The idea is super praise

Snails, a small animal, should not see this passage, although this is very good.

idea good