The seventh day of the fifth lunar month is a neighborhood festival, which is about neighbors. Neighbors who live nearby are usually the main targets of activities, with the aim of promoting neighborhood harmony, promoting neighborhood interaction and advocating mutual assistance. The earliest founder of "5 7 Neighborhood Festival" was Mr. Koala, a community O2O network company. Creativity originates from the development concept of community o2o, and the main body of community construction is community residents and property, so it is necessary to increase their interaction and trust.