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This product is a new coronavirus popular science education book designed for children. The book not only contains virus-related knowledge and protection knowledge, but also provides a mask that can replace the filter element, and each page of the book is a detachable filter element. When in use, you only need to tear off the pages of the book after reading and put it in the import cover, and then you can use it. While providing knowledge to children, make the best use of the books. Whenever one more person learns to prevent, one more person will be cared for, and we will have more strength to defeat the virus.