In Mandarin, each character has a unique sound, and tones can be used to further distinguish them. When using Mandarin in shortwave communication, the pronunciation of call signs is more easily understood than relying solely on English explanations, which offers certain advantages.
I have specifically designed a system for explaining Chinese characters, aiming to clearly differentiate the pronunciation of each character. For characters with similar pronunciations, I use tones to distinguish them, which helps reduce errors during transcription and receipt.
The use of words to represent letters in English is due to the fact that English letters do not have tones, and a word can contain many syllables. In Chinese, each character corresponds to one syllable, with tones used for further distinction. When explaining, you can choose to lengthen or shorten syllables at will, using syllables and tones instead of words, and favoring consonants, which is an advantage rather than a disadvantage.
Using two-character idioms to explain letters is more clear than using single letters, but it's not very convenient for extending syllables. In the future, we could design a system for explaining two-character idioms.