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Although the city is bright and bright in the daytime, at night, there will be many tramps on the streets, curled up in all corners of the city, especially in winter, the ground is more cold, and tramps need to work harder to find a warm place. To solve this problem, we have designed a place that can provide warmth. During the day, it absorbs light energy through solar panels and converts it into electrical energy to make the light tube glow and make the mat heat. In the evening, the tramp can pull out the cushion and use the knobs on both sides to close it after using it. With this, wanderers will no longer feel cold in winter nights.