After the video of Beer Gate and Liquor Bottle Gate were exposed, they have aroused great reactions. In the past year, a series of gates including Marine Transportation Gate and Bridge Construction Gate made people feel that an era of sexual openness has come. People born in the 90s played the leading role in this series of gate events. The emergence of Liquor Bottle Gate and Beer Gate told us a fact that will soon come into being: compared with the traditional concept in the past, people of post 90s generation are more open-minded and self-centered. This is the subculture phenomenon of post 90s generation referred in the Oku Consulting Report.