One day in 2009, a group of researchers walked into an old community in Baotou City, Inner Mongolia Autonomous Region and was stopped face to face by an old man. The old man grabbed the hand of the person in charge of the research group and asked, "when will it be our turn to renovate the old house in the next community?" the person in charge smiled and asked, "Sir, you've been unwilling to change. How can you figure it out now?" the old man smiled and said: "After the renovation of the neighborhood next door, the house was warm all day in a winter, and our family was still too cold to stay with people; both of our neighborhoods were close to the road. After the renovation of the house, people slept soundly and sweetly at night. All night, we heard the sound of cars coming and going in our ears and dreams, just like we didn't sleep; also, you see, after the renovation for a few days, the house prices in their neighborhood were rising. I There was no movement... "