Mandarin Chinese
Mandarin Chinese is the most spoken type of Chinese in China. All Chinese type languages use the same writing system, although some colloquialisms do exist. Mandarin has 4 tones plus a neutral tone.
Hanzi
Pronunciation
Pinyin
Syntax
Mandarin Dictionary
Lesson 1
Lesson 2
Lesson 3
Lesson 4
Cantonese
Cantonese is spoken around Hong Kong , South and South-East China. It has some similarities such as a few words; but it's a completely different language compared to Mandarin, and has 6 tones. The differences can be shocking (Ni3 is Mandarin for "You", but "Lei5" is the exact same thing in Cantonese).
Hanzi
Origins of Cantonese
Pingyam
Wade-Giles (if this is out of place, just change it)
Zhuyin
Tones
Learning Hanzi
First Steps
How to Write
Step 2
Step 3
The Chinese Writing System; Hanzi
Hanzi are pictographs and ideographs used to represent words or meanings.
Over 60,000 exist; but only 10,000-odd are needed to read a newspaper in China