Houses in Korea are like this, basically wooden floors, and then generally do not wear shoes at home. Some families also wear slippers, but they are very clean. Every day, they clean the house and wipe the floor, so the house is very clean. Do you think it is possible to put the shoes worn outside at home?

If you know Korean friends, you will understand this truth. Koreans don't wear shoes at home, and the room is very clean. You must clean the floor every day. In some clean Korean families, you can't even find a hair on the ground. It's a bit exaggerated, but it's really clean, which most people in China can't do.