"The Administration still emphasizes that our top priority is to ensure the safety and longevity of cultural relics for posterity; excavation is only considered as a last resort," Tong Mingkang, deputy chief of the State Administration of Cultural Heritage (SACH), remarked at the evaluation conference to select the top ten archeological discoveries in 2010. Of the archeological digs approved by SACH, 90 percent were on the perimeters of development projects. For instance, preservation and salvation of historical sites were part of the planning and execution of colossal constructions such as the Three Gorges Dam, the waterways diverting water from the south to the north, and natural gas pipelines running west to east. The remaining 10 percent of excavations were made because of their crucial importance to major fields of study. In the future China will remain highly prudent about archeological excavations, particularly of ancient tombs.