As concerned about their surroundings as the people of today, they dispose of their trash in a two-meter-deep ash pit. An earlier discovery The Chienshan archaeological site was discovered in Tayuan Township, then known as Tachiuyuan, during the Japanese era.
其實，舊名「大坵園」的桃園縣大園鄉，日據時代便以「尖山遺址」著名，而遺址的發現與大園國小建校更早有關係。