It is difficult to move to a new home in the republic of Cuba, because Cuba has a lack of house supply. In addition, in the Republic of Cuba, which is a communist country, house trading is prohibited by law. So, Cubans use an interchange system for changing their houses. It is like bartering. A number of Cubans, who want to move, look for an area, where they would like to live. They then prepare a flyer with their house information and a picture to show it to others. Due to the Cuban real estate market condition, sometimes interesting situations happen. For example, a divorced couple could be obliged to live in the same house. Recently, the housing shortage has become more serious than before. Therefore, the government is spurred to promote new house construction. However, Cubans are still bartering their houses to move.