The two circles express the World Exhibition as a window displaying all countries¨ achievements in economy, science, technology and culture - a union of the wisdom all peoples. The interacting circles indicate that the World Exhibition presents a grand stage for communication and exchange, flowing like water and embodying the affinities and vitality of people from all countries.

　　Green symbolises natural life and purple symbolises space, science, technology and exploration. These two colourful circles combine organically to embody the meaning of the modern city. These two circles rotating at full speed and eventually fusing together represents the aim of the World Exhibition: a gathering of all to learn from one another.