A commercial satellite photo taken Monday over northwestern China shows what experts say is a construction site for a new silo for a nuclear-tipped ICBM. The construction site is hidden under a 230-foot cover, a common concealment practice observed at other Chinese missile sites. (Planet/Center for Nonproliferation Studies)

Researchers using commercial satellite images spotted 119 construction sites where they say China is building silos for intercontinental ballistic missiles. The image has been annotated to show site locations. (Planet/Center for Nonproliferation Studies)

这是第一批的卫星照片和说明。明明白白写的照片2的119个导弹发射井建筑场地，照片1是其中一个导弹发射井建筑场地。

这是第2批的卫星照片和说明。明明白白写的照片2是现有的玉门风电场，照片1是他所谓的一个119个导弹发射井建筑场地，但是这个照片有更多的细节，看得出所谓导弹发射井建筑场地之间还有排列整齐的圆孔，像是风车的机坑。

Left, a section of the Yumen Gansu Changma Windfarm.  Right, a section of the nearby silo field. The windfarm has turbines spaced 400 m apart. The silo field has construction sites, some covered with air-supported structures, spaced 3,000 m apart. This isn't a tough call.