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Qi is indeed a polyphonic character. I've been on the Q&A forum for years and I remember netizens discussing this topic around 2005. It has two main pronunciations: jǐ and qǐ.
When pronounced jǐ It refers to a place name like "Qixian" which is such a place in Henan. When pronounced qǐ It is used to refer to a type of tree that is "Qi" in the legendary "Horror People". Some scholars at that time used this word in different ways in ancient times, so it had many sounds.
Interestingly, I also found references to some ancient documents. For example, "Qi" was used in "Zuo Zhuan", but the pronunciation is different from today. Therefore, Polyphonic characters are also common in ancient texts, reflecting the evolution of language. I personally do not visit this area.我记得数据在X左右，但我建议你验证一下。