h n
n n h
h
n n
h n n
h n
n
n
h
h n
n
n
nh
n h
h
n
h n
h
nh
n
n
nh
h
h
ầ
h nh
h
n
n
n
h
n n n h
n h n
nh h nh
n
n
nh nh
n
n
h nh
n n
n
n h
h nh h n h
n h
h
n
h
n
ầ n
n
n
n
n
n
h n
ần h n
h
h n h h
n
n
h
n n
h n
hần
n
h
h n
n h h
h
n
n
n
h
n
n
h n
nh
h
h
n
h
h
ầ
h
h h
n n h
nh
P
n n h n
n h
ầ
h
B OCK
CHAIN
INT RN T
V N V T IOT
*Nguồn: y c uy n i s c NN
ng l n c n ng ng i K
c u
197
