<s>
Moments	O
(	O
Chinese	O
:	O
朋友圈	B-Application
pinyin	O
:	O
péngyǒu	B-Application
quān	I-Application
)	O
is	O
a	O
function	O
of	O
the	O
smartphone	O
app	O
WeChat	B-Application
,	O
launched	O
on	O
19	O
April	O
2012	O
in	O
the	O
WeChat	B-Application
version	O
4.0	O
.	O
</s>
<s>
It	O
serves	O
new	O
social-networking	O
functions	O
for	O
Wechat	B-Application
users	O
.	O
</s>
<s>
The	O
Chinese	O
translation	O
of	O
Moment	O
is	O
known	O
as	O
“	O
Friends	O
 '	O
circle	O
”	O
,	O
which	O
means	O
users	O
can	O
share	O
and	O
get	O
access	O
to	O
accepted	O
WeChat	B-Application
friends	O
 '	O
information	O
,	O
creating	O
an	O
intimate	O
and	O
private	O
communicating	O
circle	O
within	O
the	O
users	O
 '	O
choice	O
of	O
close	O
friends	O
.	O
</s>
<s>
After	O
registering	O
a	O
WeChat	B-Application
account	O
,	O
users	O
can	O
add	O
other	O
WeChat	B-Application
users	O
as	O
"	O
friends	O
"	O
and	O
"	O
like	O
"	O
or	O
"	O
comment	O
"	O
on	O
friends’	O
posts	O
freely	O
.	O
</s>
<s>
According	O
to	O
the	O
On	O
Device	O
Research	O
,	O
WeChat	B-Application
has	O
93%	O
market	O
penetration	O
in	O
mainland	O
China	O
.	O
</s>
<s>
The	O
installation	O
of	O
the	O
application	O
WeChat	B-Application
itself	O
and	O
the	O
usage	O
of	O
basic	O
functions	O
including	O
Moments	O
is	O
free	O
.	O
</s>
<s>
Marketing	O
becomes	O
a	O
problem	O
because	O
some	O
users	O
operate	O
online	O
stores	O
by	O
using	O
their	O
Wechat	B-Application
accounts	O
.	O
</s>
