In the past, people harvested grain self, so they used it to remove dust and husk mixed in the grain, she explained. The principle of Key she said was that the Key contains grain, so shaking it up and down would cause relatively light dust and shells to rise, leaving the grain to sink, leaving only good grains for it.

In addition, there was a culture in which a young child was forced to wear a Key and went to get salt from the people in the neighborhood when he peed on a blanket. This culture includes the belief that when a child wears the Key to pick out only good things, the bad disappear, and only good things remain. So, It represents parents' hope that the child will never pee on the blanket again.

She said she had seen her mother use the Key as a child and loved the sound of the grain hitting against each other when using the Key. She also said she remembers her younger brother peeing on a blanket when he was very young, wearing a Key, and going around the neighborhood.

Next, I will write down my observations and reflections on this place. I found a total of three welfare infrastructures here. First, a diaper changing station for parents with infants was installed in the bathroom. I thought that diaper changing stations were installed only in the women's bathroom because most women are in charge of child-rearing in Korea, but I was quite surprised to see that the diaper changing station mark was also drawn in the men's bathroom. Realizing that my stereotypes were serious, I thought it was a good infrastructure to be installed to care for children regardless of gender.

Second, a Braille path was installed on some tracks on the floor of the building. This infrastructure is designed for the blind and helps them move smoothly and safely inside the building. I was interested in this Braille path and walked along the Braille path to check that the Braille path was well-established. The Braille path was primarily continuous from the entrance from the entrance of the building to the entrance of the multipurpose hall and the entrance opposite, and some Braille path was installed at the entrance of the bathroom, escalator, and elevator. However, I think this infrastructure was insufficient to a large extent. As a result of walking along this path, Imagining myself as a blind person, they didn't have the freedom to travel around all the buildings or view all the fairs freely, and there was only a multipurpose hall path. I thought their freedom of movement was very low because the rest of the roads could only recognize that there were obstacles in front of them.

Third, I observed elevators installed for people who had to use wheelchairs. For those who could not use escalators and stairs, many elevators were installed throughout the building, which played a role in helping people who had difficulty moving due to physical disabilities.

At the end of this article, I thought that more effort was needed to secure mobility in this place to improve local welfare services. First, it is suggested that more Braille routes should be installed to secure the free mobility of the visually impaired. Second, it is suggested that more automatic doors should be installed. With the installation of the elevator, those in wheelchairs will be able to move freely to the number of floors, but when looking at the building, there was only one entrance of the automatic door. The rotating door or the door that must be pushed or opened will act as a barrier for wheelchair users. Therefore, it is necessary to expand the installation of automatic doors to ensure their free mobility. In conclusion, although most of the places I went to were well equipped with facilities for the socially disadvantaged, I think we will be able to provide more convenience to them through further improvement.