X
Y
The statement of "anti" is actually the embryonic form of the beginning and the end. For example, the definition of "Zhong" is "Zhu Yong's antithesis", that is, the initial "zh" of "Zhu" and the vowel "ong[ with the fourth tone]" of "Yong" are put together to form "Zhong [with the fourth tone]".
Of course, there was no complete pinyin system in ancient times, and it was impossible to reach the standard. For example, the following word "degree" should be "multi [two tones]" in modern Chinese Pinyin, which means "measurement". In ancient times, there was a note in Du Yin Anti-Luo, meaning "Tuo [Four Tones]".
There are at least three reasons for the error:
1. The dialect problem of the annotator leads to inaccurate phonetic notation.
2. With the passage of time, the pronunciation of annotation words has changed. It was really read like that at that time, but now it has evolved differently, and different sounds have taken place in ancient and modern times.
3. When taking notes, the selected "sound X"
Y
In "anti", x or y has different sounds in ancient and modern times.