It premiered at the 2013 Venice International Film Festival, where it was nominated for the prestigious Luigi De Laurentiis Award.
During his spare time, he makes a little extra money by helping private clients to install CCTV cameras in places he has identified on his maps.
One day, he finds an attractive young woman, and deciding to pluck up the courage to meet her, he tells her about his hobbies and the nature of his job.
He offers her a lift home in his car, but after he has dropped her off, notices a small box with a memory stick inside it.
However, Guan does not turn up, and a man arrives instead to collect the memory stick, asking Li for his home address so that he can thank him properly.
Losing contact with Guan, and unable to find her, Li decides to try tracking her down using the digital map he has created, and by accessing the video images off one of the CCTV cameras he has set up nearby.
The film's title inverts the meaning, becoming a real street which is deliberately obscured or removed from a map - and anyone who attempts to identify it by placing it on public record is then 'trapped'.