Chinese stops distinguish aspirated and unaspirated, not voiceless and voiced as in English. So p, t, and k should be pronounced with a puff of air.
b
as in ball or spall
c
as in rats
ch
as in chore
d
as in do or stew
f
as in fun
g
as in gang
h
as in her
j
as in jeer
k
as in king
l
as in lease
m
as in mow
n
as in none
ng
as in sing
p
as in pit
q
as in cheap
r
as in genre or fair
s
as in sag
sh
as in shoot
t
as in tongue
w
as in wing, but silent in wu
x
as in sheep
y
as in yet, but silent in yi, yu
z
as in red zebra
zh
as in jungle