The advantage is that it is suitable for exterior wall painting, and basically any pattern can be made. After all, it was printed by a printer. There are also many shortcomings and high investment. A machine costs 30 thousand to 40 thousand, and a broken nozzle costs a lot of money. The operation is also troublesome. When not in use, the ink must be released, otherwise the nozzle will be blocked, and the track should be assembled during construction. The biggest drawback is that the wall is limited. There are dozens of centimeters up, down, left and right, which can't reach the edge. However, it is not a big problem to do wall painting on the exterior wall, and it is more troublesome to do home improvement. If you are engaged in government business for a long time, teams or studios that do exterior wall culture can also consider buying such machines for use.