The Yellow Duck came into being in 2007, had visited to 13 cities worldwide and made attractive gathering of a mount of people wherever it went. 2 million people were to be attract to go to Victoria harbor in the first week of May in Hong Kong. When the people stand, the riders get off bike, the stranger stat to dialogue, is the existence of value in public space of Yellow Duck. City is to be like a home and port is to be like a bathtub. Yellow duck give shape to our childhood memories, leading modern people go back to their beautiful memories.