Oh, you told me today

I found a special designer in the magazine. Her name is Wang Aili, and her design concept appeals to me very much. Then she recalled her interesting story at school: a classmate came to class and brought a pillow, then cut the pillow in half with a blade, took out cotton and threw it on the post overhead with a fishing line. He said to himself, I think I need a cloud, because cotton is a little dirty. He said, that one is a dark cloud.