Four tones

Level

A1
Related to
1. Neutral tone (A1)
2. Pinyin chart (A1)
3. Tone change rules (A2)
4. Tone changes for "bu" (A2)
5. Tone changes for "yi" (A2)
6. Tone changes for third tones (A2)
7. Tone changes for multiple consecutive third tones (B1)
8. Tone pair 1-0 (B1)
9. Tone pair 3-3 (B1)
10. Tone pairs (B1)

Also known as: 四声 (sìshēng).

One of the first concepts you need to learn when tackling Mandarin Chinese is tones. You'll often hear that there are four main tones, although there is also a "neutral tone," so you sometimes hear it said that there are five.

Sources and further reading

Wikipedia: Standard Chinese phonology: Tones
Wikipedia: Mandarin Chinese: Tones
Wikipedia: Four tones (Chinese)
Sinosplice: Toward Better Tones in Natural Speech
Hacking Chinese: Tones are more important than you think
Sinosplice: Kaiser’s “Dude System” of Tones