In order to celebrate the 18^th anniversary, Shanghai Grand Theatre held a lot of activities on Aug. 27^th and 28^th. Full Dimension took part in the cappella performance and provided technical support for the performance. Shanghai BG Choir presented a cappella performance to the audiences in the form of flash performance and road show. The performance through the most pure vocals, provides the audience with a very wonderful immersive experience, let them as if place themselves in a real scenes.