Correct

下线

/ xià xiàn / 
Strokes

Definition

to go offline

Example

As a Verb

come off the production line

1
Zhè
这
chē
车
míngnián
明年
yī
一
yuè
月
kěyǐ
可以
xiàxiàn
下线
  
。

The car will come off the line next January.

As a Noun

log off; be off-line; be disconnected (to the Internet)

2
Tā
他
yǐjīng
已经
xiàxiàn
下线
le
了
  
。

He is already off-line. / He has logged off.

As a Noun

(usu in a pyramid selling scheme) new member/recruit