Correct

城防

/ chéngfáng / 
Strokes

Definition

city defense

Example

As a Noun

city defence

1
Chéng
城
fáng
防
gǒnggù
巩固
  
。

The city has strong defences. / The city is closely guarded.

2
Chéng
城
fáng
防
jiànshè
建设

city defence construction

3
Gǒnggù
巩固
chéng
城
fáng
防

strengthen the defence of a city