Many tourtists awalys graffiti on the Great Wall real structure ,so the managemengt office set up a fake wall to potect the real wall .The tourists could by paying money attain chance to graffiti the fake wall. In my views, set up a fake wall is a great idea,it not only meet people graffiti on the structure,but also protect the Great Wall real structure. As a sayong goes 'One stone kills two birds .'The management through charging can have more mong to repair or protect The Great Wall.But many people graffiti on the structure is a bad behavior .From two aspect to say ,on the one things,it can damage many heritage ;on the another things ,it need a geat deal of fortune to fix. In conclusion ,graffitiing on the structure is a bad behaior ,and the office set up a fake wall to allow people graffiti is a good idea.Last bu not least ,people shuold protect the heritage.