The opening ceremony of World Expo 2010 was held in the evening of April 30, 2010, with the attendance of dozens of world leaders. The ceremony consisted of an indoor and outdoor component. Jackie Chan, Lang Lang, and Andrea Bocelli were among the performers in the indoor component. The event featured an outdoor display of fireworks, lasers and dancing fountains after a performance by singers and dancers. President Hu Jintao declared open the Shanghai World Expo.