Gregory So (2nd L), Secretary for Commerce and Economic Development of Hong Kong, attends a party to celebrate the confirmation of a guitar as the world's most valuable guitar, April 8, 2015. The guitar is called 'Eden of Coronet' and is adorned with 11,441 pieces of diamond (401.15 carats) and 18k white gold (1.635 kg). The guitar designed by Aaron Shum is valued at two million US dollars. [Photo/China News Service]