The project is divided into two parts. The first part uses the progressive structure in book design to reveal the lack of protection of single people of China’s existing social and legal system and warn the young singles who look forward to single life. The second part uses a photography installation with voice recording to present the thought changes of the young singles before and after they receive the warning. The project explores the contradiction between the individualization of the social structure and the old system based on the traditional family, trying to improve the current social system, arousing the public to think about the lack of security provided to the singles.