Generally underground military facilities are more difficult to be located than the surface installations, especially if they are camouflaged and secured. But, despite this, advanced sensing systems and satellite imagery can offer some useful data. A frequent topic in China underground military activities construction is the methodology that analysts use to detect and track underground military activities construction projects. Underground structures may provide cover benefits, but may have noticeable signs during large construction operations. The use of surveillance technology continues to change, and there is a need to weigh the need for secrecy versus detection when developing military infrastructure.