6. The Chinese input method according to claim 3 , wherein there are 3 of the compound vowel keys, and the phonetic symbols of the compound vowel keys are respectively the groups of ( ), ( ), and ( ).
3. A Chinese input method used for a hand-held electronic device, wherein the hand-held electronic device comprises a plurality of input keys used for inputting phonetic symbols, the input keys are divided into three groups: initial consonant and tone keys, compound vowel keys, and medial vowel keys, and the Chinese input method comprises: pressing one of the plurality of input keys to input a first phonetic symbol of a Chinese character; switching the function of some of the initial consonant and tone keys to function as tone keys; and pressing one of the tone keys to input a tone for the Chinese character.