The catkins in April are compatriots in the haze. They test the physical fitness of the people in Beijing. They fly continuously and evenly. The white snow sky unifies the hue of spring. "Bouncing cotton" is one of the traditional Chinese handicrafts. In the old days, many farmers and artisans in rural areas played cotton batts for people all year round. The purpose was to make cotton softer and more suitable for use. This work attempts to reconstruct the action of "bouncing" and change the shape of the willow catkind. Through the elements such as senses, touch and sound, the audience can connect with and participate in the work on a multisensory level. This piece uses ecological and culturally relevant objects to respond to the space and city in which they were created. The work combines "bouncing" and "bouncing" to connect the audience status in the internal flying scene with the audience who is struck on the outside, and invites the audience to actively join. The actions and works of each other are connected in series, mixing individual and collective, experience and experience.