In reality, Mr.Sun is a madman wandering in foreigners street amusement park; In the film, he looks like an alien who has descended on foreigner street. The film uses Mr.Sun's actions and observations as explicit clues to integrate different time and space and events of Foreigners' Street. Mr.Sun's travel in foreigners street has gone through several stages of landing, transition and entanglement. Finally, he takes the UFO and leave.