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After spending a long time to write an article, you need to repeat modifying to determine the accuracy of the written words. But some small mistakes may be neglected due to the physical and mental fatigue caused by long-time writing. Our design will solve this problem. After finishing the article, you just need to sweep the text gently with the "Correction Pen" ,and the head of pen will send out different kinds of lights. The light is blue when text is right and turns to red immediately once wrong words or grammatical errors were checked out, and an electronic screen can display mistakes and corrections simultaneously.