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This needle is designed especially for the elderly or who has poor sight.The user just need to pull the string against the tiny hole on the top of the needle,then the string could easily get through the hole.
Li Qiong,Peng Junjie Li Xin,Ding Zhihao,Guo Yu,Yu Qi,Wang Jiaxi,Zhang Xusheng, Ying Fangtian