1, pinyin input method; 2. Shape code input method; 3. Sound-shape combination code; 4. Internal code input method. Pinyin input method has natural advantages over other input methods, because every educated China person will spend a lot of time learning Chinese Pinyin or Phonetic Alphabet before learning Chinese characters. Pinyin, originally used to mark the pronunciation of Chinese characters, can be conveniently used as the input code of Chinese characters.

1, pinyin input method

Pinyin input method adopts Chinese Pinyin as the encoding method, including full spelling input method and double spelling input method. The generalized pinyin input method also includes the pinyin input method used by Taiwan Province people and the Cantonese pinyin input method used by Hong Kong people.

2, shape code input method

The shape code input method is a method of coding according to Chinese characters such as strokes or Chinese characters. The simplest shape code input method is Wu Bi painting input method, which is widely used in handheld devices such as mobile phones.

3. Sound-shape combination code

Phonetic code input method is an input method with pinyin (usually pinyin initials or double spelling) plus Chinese strokes or radicals as the encoding method, including phonetic codes and phonetic codes.

4. Internal code input method

Internal code input method belongs to unreasonable code, which is not an input method in the general sense. In Chinese information processing, we must first determine the character set and give each character a number or code, which is called the internal code.