 With the robbed urbanization in China, a large number of urban residents live in informal housing, which knocks for more 10-year security. Based on my recent research in seven Chinese cities, I found that such informal housing has a high level of perceived 10-year security, because residents believe the housing belongs to them, and even showed me the informal purchase contract, and they don't think eviction will happen. A majority of residents said they purchased informal housing for a place to live and to have a sense of home in cities. Therefore, the malfunction of such housing fulfills the demand for affordable and decent housing by the urban poor.