CoBuild aims to help young people to connect with their own community and other residents nearby. The direction of our design is to reform our community and connect to it because It is important to maintain a good relationship with your community as we are all living together and we should try our best to participate in it and contribute to it. As It is difficult for young people to participate in community activities and making decisions with the management system nowadays. An online mobile platform can be created for them as they usually like to express their opinions on different online platforms and their involvement in their own community can be increased.