Correct

长蛇阵

/ chángshézhèn / 
Strokes

Definition

single-line formation (army)/fig. long line

Example

As a Noun

single-line battle array; long queue

1
Pái
排
chéng
成
yī
一
zì
字
cháng
长
shé
蛇
zhèn
阵

deploy the troops in a long line; string out in a long line