This is a case for display advertising device,the customer is from UK,when we discussed with customer for the first time,the design had some issues for whole assembly,we provided some suggestions and our engieer made some optimization based on the previous design,then made 3d printing prototype for customer,Fortunately,the test is very good and matched perfectly,we produced one container to ship to customer,we cooperated together until now,and developed the other style for the display advertising device.