LCD display/ indoor kiosk/ digital sinaage/ ad player/ LCD monitor was composed of a display screen and a DVD player or a PC. later, with the introduction of network technology and the rapid development of modern society, people have higher and higher requirements for advertising machines; After several years of reform and renewal, the dedicated network media player has completely replaced the traditional pure DVD or PC player, and its functions have become richer and its applications have become more diversified. It meets people's needs. Therefore, some people rank it side by side with paper media, radio, television and the Internet, and call it "the fifth media".