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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cuān, cuán, cuǎn, cuàn

first tune

cuān

quick-boil 汆 cuān

quick-boil boil for a short time 汆燙 cuān tàng
quick-boil 汆 cuān	heat in hot water 燙 tàng

Chinese characters also pronunced cuān

fourth tune

cuàn

flee; escape scurry; run away 竄 cuàn

Chinese characters also pronunced cuàn