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It is a pets fecal bag which has the advantage of environmental.All kinds of seeds inside the bags.We just close the bag up and fall it away in green belt after use,then the bag will be degraded automatically and th0e seeds will germinate and grow up. There is a pattern that tells the category of the seed on the surface of the bag .
HU Tianpei, LIANG Ying, WANG Jiaxi, QIU Jiaoying