The following video demonstrates each syllable of the pinyin structure
and the exercise of pinyin/zhuyin with basic Chinese 4-tune pronunciation

Mandarin pinyin tunes
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sān, sán, sǎn, sàn

first tune

sān

three; number 3 三 sān

third tune

sǎn

umbrella 傘 sǎn

fourth tune

sàn

scatter; disperse idle; leisurely 散 sàn

talk a walk walk leisurelly 散步 sàn bù
leisurely 散 sàn	step; walk 步 bù