On May 28, 2008, 16 days after the Wenchuan earthquake devastated Dujiangyan and the western suburbs of Chengdu, the Chengdu city government and the Ministry of Railways agreed to build a high-speed railway line as part of the reconstruction of the disaster zone. Construction began on November 4, 2008 and involved 20,000 workers at the cost of ¥13 billion. The line entered trial operation on April 1, 2010 and full commercial operation began on May 12, 2010, the second anniversary of the large earthquake that killed some 70,000 people in the region.