In 2001, the Qiwulan Archaeological Site, excavated in the modern-day Erlong Village, Jiaoxi Township, Yilan County, was identified as one of the mid- to late period archaeological sites from the Iron Age in Taiwan. This site is an example of archeology, anthropology and history complementing one another. A great variety of items were unearthed here, with wooden furniture being of particular interest. In addition, graves, ash pits (for general waste) and wooden stilts from stilt houses were also found at this site. After carbon-14 dating was conducted, these items were assessed as being between 1,500 and 100 years old .