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
Click the framed calligraphic Chinese symbol icons
to link more related multi-character Chinese words!

lēng, léng, lěng, lèng

second tune

léng

edge; ridge 稜 léng

mountain ridge crest line of the mountains 稜線 léng xiàn
ridge 稜 léng	line 線 xiàn

third tune

lěng

cold 冷 lěng

air conditioning 冷氣 lěng qì
cold 冷 lěng	air 氣 qì

calm; cool-headed composed; imperturbable; self-possessed 冷靜 lěng jìng
cold 冷 lěng	quiet; silent 靜 jìng

fourth tune

lèng

distracted; stupefied 愣 lèng

Chinese characters also pronunced lèng