In an English composition, write about a strange thing happening in a certain community, describe what the strange thing is, and reveal the mystery of the strange thing.

My hometown is a beautiful place, surrounded by green trees and grasses. However, it used to be a sad, dirty town.

There were only several thousands people there, and most of them lived in dark, unhealthy buildings on narrow muddy streets. But now they move to newly-built buildings in different living quarters. The streets have been widened, with all kinds of trees planted along the two sides. And some parks and green lands have been constructed in the city where citizens can take a walk or do sports.I love my hometown and cherish the beautiful hometown.