What's the difference between the word Pinghelin?

Hello, my friend. Some rhymes in Ping Yun Shui contain some words with different vowels. When writing Linz Zheng Yun, some rhymes are divided into two parts, such as Jiujia [half], Shi Hui [half], Jiutai [half] and Eleventh Team [half]. Obviously, Mandarin distinguishes different vowels. The New Rhyme of Chinese puts the word "e" in the rhyme of "five micro". The word of "I" vowel is placed in 12 rhyme, but some of it is in 13 rhyme, so 12 rhyme and 13 rhyme should be connected. Best wishes and blessings.