What approval process is needed to make LED display on the external wall of the building, and what positions need to be recruited after approval?

You definitely need to go to the urban management and then register with the advertising department of the urban management. You have to pay a monthly fee. Charge per square meter. Need to apply for an advertising license. It also depends on what kind of screen you are. If it is a full-color screen of 20~50 square meters, you must register. If it's some single red ones, 5~6 meters long and 0.2~0.6 meters high, the general goal is small, I won't care about you. You can go to Nanning Xiaolin photoelectric company to have a look.