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Qingdao ZeFuYuan Science And Technology Development Co., Ltd. Qingdao ZeFuyuan Science and Technology Development Co., Ltd. is a leading manufacturer specialize in dental floss pick, interdental brush, storage box, plastic products, PP, ps, raw materials etc. There is a complete and scientific quality management system. Many big customers from Europe, USA, Australia and Japan have benefited a lot from our product, to provide all the customers top quality product with competitive price is our purpose all along.