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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to link more related multi-character Chinese words!

wān, wán, wǎn, wàn

first tune

wān

bend; bent crook; crooked 彎 wān

bay; gulf bend of a river 灣 wān

Chinese characters also pronunced wān

second tune

wán

pellet; small ball medical pill round mass of food 丸 wán

meatball 肉丸 ròu wán
meat 肉 ròu	round mass 丸 wán

play with; have fun 玩 wán

finish; complete 完 wán

Chinese characters also pronunced wán

third tune

wǎn

bowl 碗 wǎn

late night; evening 晚 wǎn

dinner; supper 晚餐 wǎn cān
night; evening 晚 wǎn	meal 餐 cān

Chinese characters also pronunced wǎn

fourth tune

wàn

ten thousand; number 10,000 萬 wàn

wrist 腕 wàn

Chinese characters also pronunced wàn