I believe that an individual action can lead to collective change, creating a sustainable community. Sustainable communities are communities planned, built, or modified to promote sustainable living. This may include sustainable aspects relating to equality, water, transportation, energy, and waste and materials. On the other hand, communication, which is also a part of our sustainable living, ought to be improved by individual’s action. From my experience, in order to relieve my stress in school network, to better merging into local communities, I want to make a change to high five with passengers in campus. During this action, I’m surprised that strangers were easygoing and willing to high five with me, which gave me big encouragement. Therefore, I hope this action is able to pass on friendly to strangers and create a sustainable community in campus.