With the development of the economy, the past several years have witnessed a social phenomenon that more and more families paying attention to the history of the constructions they currently live in. As far as I’m concerned, there are two main reasons: 1) the first one is about the ages of the properties, which might be so old that the public doubt whether they should be rebuilt in the future. 2) the next concern is whether the surroundings of their houses are suitable for residential or marked as uninhabitable. I would elaborate on the two points in the following paragraphs.