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The project is a privacy guard for people shopping on line. The portable pen serve for the people to erase privacy on the parcel.“erase privacy” contain alcoholic liquid and a oily pen and a plug in the bottom. We use the pen to erase our privacy from the paper which will go to the rubbish. In china we all would like buy on line. It is said that Tmall’s turnover was RMB 57.1 billion in the day of 11/2014/11 named Single's Day. “erase privacy” protect our information of shopping on line.