DELL gathered its fans in RenRen to join a campaign called DELL PIGGY BANK, to save money for buying a new notebook together with their friends help.By this way, a promotion comes to a huge game between fans and their friends. At last, DELL gatherd 2.3million Fans join the event, and sold out 953 notebooks in only 9 weeks, and then got a rise of ¥7 million in sale.