In 1990, Wang quit his job to participate in a three-year project with U-Theatre, entitled "Retrospect." He began engaging in folk ethnography, studying religious rites at the temples, the dramatic performances of temple troupes, as well as Aboriginal sacrificial rites.
1990 年，為了參與優劇場長達 3 年的「溯」計劃，王榮裕辭去電腦公司工作，展開台灣民俗田野調查，廣泛學習民間廟會儀式、陣頭小戲與原住民祭儀… …。