This photo taken on April 15 shows the model Tiangong-1 in Shijiazhuang, North China's Hebei province. The model Tiangong-1, 10m in length, 1.6m in width and 3.35m in diameter, was built to scale by several enthusiasts, took 4 months to complete and is the same size as the real Tiangong-1. [Photo/chinanews.com]