The connection project of Haian Road imitates the rebuilding of the underground business district and future integrative planning. The artist attempts to guide the viewers to “see through” the underground through this artwork. The bright sky portrays a “sky city” full of hope and imagination in regard to the “underground.” Viewers are inspired to approach rainbows and peace doves in the sky, and the drain cover on the side has been transformed into the top of a big column reaching to the sky. The artwork has been extended to an extrusion on the entrance to the underground business district, forming a running spring, “3D illusion effect on the two dimensional space,” diversely converting the spatial relationship.