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Chopsticks is Chinese main tableware. However the slender formation will pollute their heads when they are put on the table. Never down adds a crook (or bulge) on the traditional chopsticks and makes the tails of chopsticks heavier so that they can maintain uptilted not being polluted. Meanwhile the crook or bulge will make the stash easier by conciding the head and the tail.
Huazhong University of Science & Technology
Huazhong University of Science & Te
Jiaqi Liu Yunlin Zou Zhenfeng Mao Zhenqi Han