Correct

高墙

/ gāo qiáng / 
Strokes

Example

As a Noun

high wall

1
Bīngyíng
兵营
sìzhōu
四周
bèi
被
gāoqiáng
高墙
wéi
围
zhāo
着
  
。

The barracks were surrounded by a high wall.

As a Noun

prison

2
Gāoqiáng
高墙
nèi
内
de
的
shēnghuó
生活

life in prison