Da Nang, May 14 -- The Da Nang International Fireworks Festival (DIFF) 2026, themed "Da Nang - United Horizons," is expected to deliver a breakthrough in stage scale and performance technology along the Han River. According to organisers, the DIFF 2026 stage has been designed around the concept of convergence, inspired by the image of converging horizons where cultures, time, and emotions meet. With a width of up to 100 metres and a total area of nearly 1,200sq.m, the stage is considered the largest in the history of DIFF. One of the most notable highlights this year, for the first time, is the large-scale mechanical lifting arch system. The central arch, spanning more than 40 metres in width and over 10 metres in height, can move in less...