The so-called "zhe" means "thirteen", which means thirteen rhymes. It's a rhyme used in the lyrics of northern opera. It is divided according to the phonetic system of Putonghua. So "Thirteen" can be used as the rhyme of modern poetry.
The meaning of subject and rhyme is similar. When subdividing, there are wide and narrow rhymes. For example, it can be used in the "flower oblique" frog, but not in rhyme.
Vowel broadcasting
Hair flower a (ah) ia (ah) wa (dig) a
Thank you, ie (yeah) ue (ye) (about) e.
Sobo o (oh) e (goose) uo (nest) o.e.
17 I (clothes) y (pedantic) -i (Japanese education and homophony) er (children) i.y (Yu)
Gusu University
Huailai Ai (sad) Ai (crooked) Ai
ash heap
Yao tiao ao ao ao.
From Europe (ou) iu(iou) (excellent) Europe
An (an) ian (smoke) uan (bend) yan (grievance) an.
Ren Chen en (en) in un(uen)yn(yun) en.
Jiangyang (ang) ang (yang) ang (Wang) ang
Middle East eng ing (English) weng(ueng) (Weng) ong (Weng, the vowel of boom) ONG (Yong) eng.ong