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Design specification:Outdoor exercises are the optimal choice for individuals to relax their feelings and be free from the noisy cities.When travelling,however,we could come across an army of upset things which are as follows:there are so many necessary items to hold,the mobile phones are out of power in an emergency and the flashlights are power off with nowhere for charging, ect.Based on the research into these problems, we have designed a multifunctional solar-powered backpack which combines backpack with tent .And ,of course,it is exceedingly for easy portability.Furthermore,it is just being equipped with solar panels that not only solves