Modern Sky Festival 2010：Founded in 2007, the Modern Sky Festival is China's largest music and arts festival. The festival features 120+ bands/DJ's on three stages over a five-day period. The Modern Sky Festival 2010 is at Haidian Park in the heart of Beijing, October 1-4.using high quality aluminum spigot truss and steel layher truss as structure,the main saddle roof stage truss system using 390x390 box truss which loading capacity can reach 600kg by test.