Installation art
Returning to Singapore in 1979 after completing his undergraduate studies, Tang engaged in performance art, works of art that are composed of actions performed by the artist at a certain place and time. The following year, he staged a work of installation art called "Earthworks" at the National Museum Art Gallery. This comprised two works, "The Product of the Sun and Me" and "The Product of the Rain and Me", which were made up of dishes of earth, lumps of soil, and pieces of soiled and water-stained linen which he had hung in gullies at Ang Mo Kio, a construction site in the process of being turned into a public housing estate. Installation art uses sculptural materials, and sometimes other media such as sound, video and performance, to modify the way a particular space is experienced.