People visit the light show under the Harbour Bridge in Sydney, Australia, on May 22, 2015, during the Vivid Sydney light show. The annual Vivid Sydney is renowned as one of the world's largest festivals of music, light and ideas which attracts at least one million visitors from all over the world each year. (Xinhua/Jin Linpeng)

Photo taken on May 22, 2015, shows the Sydney Harbour Bridge is lit with light in Sydney, Australia, during the Vivid Sydney light show. The annual Vivid Sydney is renowned as one of the world's largest festivals of music, light and ideas which attracts at least one million visitors from all over the world each year. (Xinhua/Jin Linpeng)

Photo taken on May 22, 2015, shows the Sydney Harbour is lit with light in Sydney, Australia, during the Vivid Sydney light show. The annual Vivid Sydney is renowned as one of the world's largest festivals of music, light and ideas which attracts at least one million visitors from all over the world each year. (Xinhua/Jin Linpeng)

Photo taken on May 22, 2015, shows the Sydney Opera House is lit with light in Sydney, Australia, during the Vivid Sydney light show. The annual Vivid Sydney is renowned as one of the world's largest festivals of music, light and ideas which attracts at least one million visitors from all over the world each year. (Xinhua/Jin Linpeng)