Chinese Initials (Consonants): Sorting the 21 by Air and Tongue

An initial is the consonant at the start of a syllable. Rather than memorising all 21 in table order, it is more practical to group them by where the sound is made and whether you release air. Do not map them onto the voiced/voiceless pairs of your own language; treat aspiration — a puff of air — as its own axis first.

Six pairs to lock in first

Unaspirated	Aspirated	What to check
b	p	as the lips open, does a strip of paper move?
d	t	as the tongue tip releases, does air keep flowing?
g	k	as the back of the tongue releases, does air keep flowing?
z	c	is the air made to rub near the teeth?
zh	ch	at the retroflex position, do you release air?
j	q	at the forward position, do you release air?

Unaspirated is not “voiced.” Mandarin b comes out shorter, with the air held back. Hang a tissue in front of your mouth: with p/t/k/c/ch/q it swings clearly, and with their partners it barely moves. English speakers already make this contrast — it is the aspiration on the “p” of “pin” but not the “p” of “spin.”

Sort by three tongue positions

z/c/s are made near the back of the front teeth; zh/ch/sh/r with the tongue tip curled slightly back; j/q/x with the tongue flat and forward. Lumping them together makes them hard to tell apart by ear.

Practise across the groups: say 知 (zhī, “to know”), 七 (qī, “seven”), and 子 (zǐ, “child”) in sequence, not one at a time. Even if the sound is not perfect, being able to judge two things — “tongue curled or not,” “air strong or weak” — shows you what to fix.

Do not stop at the initial

A consonant always joins a final. j/q/x pair with i and ü sounds, the retroflex initials with -i and u sounds; get used to the combinations. To drill only the hard groups, go to mastering the difficult sounds, or work through the initials and finals drills.