Glasses-free 3D scene “train passing through building” in Guanyinqiao A video about “train passing through building” playing on air CHONGQING (CQNEWS) -- Recently, the high-profile Guanyinqiao “Asian Light” large-screen glasses-free 3D upgrading recreated Chongqing’s iconic tourist attraction “train passing through building”: the monorail slowly arrives at Guanyinqiao Station, and appears on the large screen