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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zhōng, zhóng, zhǒng, zhòng

first tune

zhōng

middle; center 中 zhōng

China 中國 zhōng guó
middle; center 中 zhōng	nation 國 guó

heart; inner feelings 衷 zhōng

end; finally 終 zhōng

clock bell; hanging bell 鐘 zhōng

Chinese characters also pronunced zhōng

third tune

zhǒng

kind; type; sort 種 zhǒng

swollen; swelling 腫 zhǒng

Chinese characters also pronunced zhǒng

fourth tune

zhòng

hit; fit for 中 zhòng

win a prize 中獎 zhòng jiǎng
hit 中 zhòng	prize 獎 jiǎng

middle; internediate 仲 zhòng

midsummer 仲夏 zhòng xià
middle 仲 zhòng	summer 夏 xià

heavy; weighty 重 zhòng

plant; grow 種 zhòng

many; numerous 眾 zhòng

crowd; people 群眾 qún zhòng
group 群 qún	crowd 眾 zhòng