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FYFT M-series unmanned blimps are Chinese UAVs developed by Qingdao Co., Ltd. Fei-Yu Aviation Science and Technology Co., Ltd. , and these unmanned blimps are named after their respective length. For example: if an M4 series blimp is 11 meter long, then it is named M4-1100, because 11 meter is equal to 1100 millimeter. M-series unmanned blimps are intended for military and para-military use with M stands for Military. The greatest difference between M-series and other unmanned blimps for civilian use such as S-series unmanned blimps for aerial survey is that for military application, data link is added to provide real-time or near real-time transmission of information gathered so troops can respond in a timely manner, as opposed to civilian versions where information is downloaded and evaluated after the UAVs have landed.