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Every year, countless toothbrush was discarded，to assume there are 60 million people in the world and every 4 months to replace a toothbrush per year，that is to say we need at least 18 billion manufacturing toothbrush, which caused huge resource consumption and environmental pollution, and all discarded toothbrush just need to replace the brush head than it can continue normal use, so I designed this Split toothbrush, it can connected by joggling, every action for replacing the brush head can save at least three-quarters of the material, while reducing the cost and can protect the environment too.