<s>
The	O
Xiaomi	O
Black	B-Application
Shark	I-Application
4	I-Application
is	O
a	O
line	O
of	O
Android-based	O
gaming	O
smartphones	B-Application
developed	O
and	O
manufactured	O
by	O
Xiaomi	O
as	O
part	O
of	O
its	O
Black	O
Shark	O
product	O
line	O
.	O
</s>
<s>
It	O
is	O
the	O
successor	O
to	O
the	O
Black	B-Application
Shark	I-Application
3	I-Application
line	O
and	O
was	O
launched	O
on	O
March	O
23	O
,	O
2021	O
.	O
</s>
