![China launches HD earth observation satellite(1/3)](http://www.ecns.cn/hd/2015/12/29/1f506d16bf87427d8613117c1d1e02e2.jpg)
Photo taken on Dec. 29, 2015 shows the Long March-3B carrier rocket is launched with the Gaofen-4 Satellite in Xichang of southwest China's Sichuan Province. China on Tuesday launched its most sophisticated observation satellite, Gaofen-4, as part of the country's high-definition (HD) earth observation project. (Photo: Xinhua/Xue Yubin)