Yuan Duan Books

Wei shen me ni de shi jian bu zhi qian
Wei shen me ni de shi jian bu zhi qian

By Yuan Duan

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Ben shu shi tu da po guan li xue de tiao tiao kuang kuang, Bu xie jia da kong de li lun, Bu ban nong hui se nan dong de ci zao, Bu chao shang jie ju shen de jiu fan, Er shi tong guo sheng huo zai w...

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Simple Embracing
Simple Embracing

By Yuan Duan, Dan Sun, Junfeng Guo

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If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.

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