Apple iPad For iOS 4.3 - Manual (Page 175)

Type letters, numbers, or symbols that aren’t on the keyboard: Touch and hold the
related letter, number, or symbol, then slide your finger to choose a variation. On the
Thai keyboard, for example, you can choose native numbers by touching and holding
the related Arabic number.
Chinese
You can use keyboards to enter Chinese in several different ways, including Pinyin,
Cangjie, Wubi Hua, and Zhuyin. You can also use your finger to write Chinese
characters on the screen.
Entering Simplified or Traditional Chinese Pinyin
Use the QWERTY keyboard to enter Pinyin for Chinese characters. As you type,
suggested Chinese characters appear. Tap a suggestion to choose it, or continue
entering Pinyin to see more options.
If you keep entering Pinyin without spaces, sentence suggestions appear.
Entering Chinese Cangjie
Use the keyboard to build Chinese characters from the component Cangjie keys.
As you type, suggested Chinese characters appear. Tap a character to choose it, or
continue typing up to five total components to see more character options.
Entering Simplified Chinese Stroke (Wubi Hua)
Use the keypad to build Chinese characters using up to five strokes in the correct
writing sequence: from left to right, top to bottom, outside to inside, and from inside
to the closing stroke (for example, the Chinese character 圈 (circle) should begin with
the vertical stroke 丨).
As you type, suggested Chinese characters appear (the most commonly used
characters appear first). Tap a character to choose it.
If you’re not sure of the correct stroke, enter an asterisk (*). To see more character
options, type another stroke, or scroll through the character list.
Tap the match (匹配) key to show only characters that match exactly what you typed.
For example, if you type 一一 (one one) and tap the match (匹配) key, the more
commonly used 二 (two) appears as an exact match.
Entering Traditional Chinese Zhuyin
Use the keyboard to enter Zhuyin letters. As you type, suggested Chinese characters
appear. Tap a suggestion to choose it, or continue entering Zhuyin letters to see more
options. After you type an initial letter, the keyboard changes to show more letters.
If you keep entering Zhuyin without spaces, sentence suggestions appear.
175 Appendix B International Keyboards