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As age accumulates, the aged people’s sight is gradually fading, bringing forth inconvenience to their daily life, for example, they cannot see clearly the shopping lists and descriptions on the packages of commodities in supermarket. In this case, a supermarket membership card named “M&M Card” is designed for aged people. A magnifier is attached to an ordinary supermarket membership card so as to help the aged people with visual Impairment. As the aged people apply for this card in supermarket, it can provide them with convenience and happiness in shopping.