Which company is the most professional in airport advertising?

Airport advertising is also divided into media forms. Let me talk to you according to the national company. Which is stronger on the electronic screen? You have to find Hangmei, LED and small screen display. They are all listed companies, which is the rolling light box, which is the conventional light box in some cities in Dean, which is the strength of Shanghai and Gaode, and others are foreign companies, including Shanghai, Chengdu-Chongqing and Shenyang. Yashiwei is still fierce, but it is a Hong Kong enterprise. There should also be Shenzhen and Sanya. Still forget Haikou, Xinjiang, Kunming, Fuzhou, Xiamen, Hangzhou and so on. Among the private enterprises, the Huajun with strong airport light boxes are Beijing, Guangzhou, Chengdu, An, Han, Chang, Da and so on. It depends on what fields and media forms you are looking for.