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Its a postcard that has a QR-code on it. Travelers can buy it at different places and send
it to the family or friends, so you dont need any batteries and electricity .Recipients get
the postcard, decode the QR-code ,then get not only a postcard, but also the sounds that
travelers have heard, and wanted they to hear.
National Chiao-Tung University
Kaohsiyng, Taiwan
Ming-Chuen Chuang
National Chiao-Tung University
Kaohsiyng, Taiwan