Apple iPhone OS 3.1 - Manual (Page 36)

Enter Traditional Chinese Zhuyin Use the keyboard to enter Zhuyin letters. As you
type, suggested Chinese characters appear. Tap
a character to choose it, or continue entering
Zhuyin to see more character options. After you
type an initial letter, the keyboard changes to
show more letters.
Enter handwritten Simplified or Traditional
Chinese Use the touchpad to enter Chinese characters
with your finger. As you write character strokes,
iPhone recognizes them and shows matching
characters in a list, with the closest match at the
top. When you choose a character, its related
characters appear in the list as additional choices.
You can get some complex characters by
entering two or more component characters.
For example, enter 魚 (fish), then 巤 (bristle), to
get 鱲 (partial name of Hong Kong International
Airport), which appears in the character list with
an arrow next to it. Tap the character to replace
the characters you entered.
When Simplified or Traditional Chinese handwriting formats are turned on, you can
enter Chinese characters with your finger, as shown:
Touchpad
36 Chapter 2 Basics