Charges. According to the query of the cool rice network shows that know know the screen can be used free of charge for a month. After checking the official website of the Zhi Zhi Ping letter sending system, users can enter the trial entrance after registering an account, and you can try it for a month after registering an account by yourself. After the trial period need to charge. Zhi Zhi Zhi screen is a Redmi TV as an advertising machine, poster screen software, to meet the needs of the letter sent to the scene, such as rotating pictures, videos, documents, and split-screen function, timed release function, a variety of dynamic poster templates, networked that is used.