In this case, it is difficult to determine the responsibility, the key is that there is no inspection at the time of delivery. However, a large household appliance chain service like Gome should be possible. I only bought it for a week. According to the national three guarantees, the shopping mall should give a new machine. (See if the package has any traces of falling. Perhaps this is the phenomenon caused by the machine falling during transportation. If you don't change it, you can complain to the Consumers Association or interview with a TV station, which is very useful. . . . .