Rhyme:
1, single vowel: a, o, e, I, u, ü
2. Vowels: ai, ei, ui, ao, ou, iu, ie, üe, er.
3. Pronasal vowels: an, en, in, un, ü n.
4. Nasal vowels: ang, eng, ing, ong.
5. Recognize syllables as a whole: knowledge, delay, time, day, word, word, thought, meaning, thing, language, leaf, month, yuan, sound, rhyme and shadow.
The evolutionary history of letters:
In ancient Egypt, "A" was a picture of a bull's head; "B" is a picture representing "home" or "yard"; "C" and "G" are pictures representing "a ruler"; "D" is a diagram representing "door leaf"; "e" is a picture of "a person who raises his hand and shouts"; "F", "V" and "Y" are pictures representing "stick" or "stick".
"H" is a picture representing "a piece of hemp coil"; "I" is a picture representing "open hands"; "K" is a picture representing "palm"; "M" is a diagram representing "water"; "n" is a diagram representing "snake"; "O" is a picture representing "eyes"; "P" is a graph representing "mouth"; "Q" is a picture representing "rope loop"; "R" is a picture of "human head".