"Trouble" is made up of three different sized LED advertising screens, purchased by the artist in a market. Each screen plays different advertisements and has varying degrees of glitch. Such kind of screens are visible everywhere in the cities, but no one would fix them due to the fast speed of urbanization. People form a habit to ignore these glitches. Through Chen’s acquisition and resettlement, these exaggerated, blunt, and even rude languages that used to haunt the city, are now glitched materials being brought back to the exhibition.