Notes:
1. Numbers inside parathesese, are the counts of pinyins, based on major ones of Chinese characters.
2. The organization of various pinyins accounts for the classification of 27 phonetci groups. The high occurrences of i and u enables them to have their own groups.
These phonetic groups can be united into 3 major groups: the jqx Group, the gkh Group, and the other mixed Group.
The jqx Group has neither a, e, nor o in the beginning of related vowels, and the gkh Group is characterized by vowels without i as the first letter.
3. Various coloring methods indicate unique features of Chinese pinyin. Pinyin in color is used to learn pinyin; Phonetic in color shows pinyins in the 27 phonetic groups;
Frequency in color demonstrates various legends of pinyin counts using various colors.