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<p>Wu Lidi, a cleaner in Nanjing University for ten years, is also a painting enthusiast who has created paintings featuring natural scenery, fire education and traditional Chinese festivals on blackboards.</p><p>Having been working in the campus for ten years, Wu said she will keep drawing blackboard paintings as long as she still works here.</p><p><span style="color: rgb(191, 191, 191);">(Compiled by Wang Xinru)</span><br/></p>