In the spring of 2004, the Collaborative Archaeological Team of IA, CASS, and Japan Nara Cultural Properties Research Institute excavated the ruins of a large-sized corridor and court complex on the Southern Shore of the Taiyechi Pool-site in the Tang Daminggong Palace, Xi'an. The results indicate that the corridors were the linking ways between the front imperial court and the park area of rear palace and those between different pavilions of the latter part. The courts were places for sight-enjoying and god-worshiping. This is the first discovery of such building remains from the imperial palace of ancient China.