BI7ANM
There's a term called "necessary frequency coordination," and they don't actually use the entire 20 MHz range from 450-470 MHz. Furthermore, MIIT has only approved the continued use of 450 MHz analog frequencies until the end of 2028, and it is rumored that they will eventually be reclaimed (with a planned change to **(Details regarding the MHz digital communication system are not discussed here). Currently, the radio licenses for various units, as well as the approval of standard and non-standard radios used in vehicles by both the National Railway Bureau and local wireless management departments, all have expiration dates before December 31, 2028.
Fun Fact 2: 45The operating frequency of .xxx MHz requires payment of a usage fee after obtaining the license, which is charged based on the number of terminals. A handheld device should cost approximately 100 yuan, while a base station will be more expensive.
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