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The memory of 512 Wenchuan Earthquake still here, at that time, there were so many people died as the lifesavers didn't find them in time. This design aims at making lifesavers find them as soon as possible. Normal time, it is just a can, when earthquake begins, people pull out the wirstband and throw it from the windows. And it will expand into a balloon that floats in midair, the triangle flag would point where the victim is; Moreover, the wirstband could detect people's vital signs and send signal to balloon, the LED inside balloon would change statu as a blood bar.
LI Ke CHEN Yiling WEI Min