Correct

撞线

/ zhuàng xiàn / 
Strokes

Example

As a Verb

breast/break the tape

1
Shuí
谁
xiān
先
zhuàng
撞
xiàn
线
shuí
谁
jiù
就
huòshèng
获胜
  
。

The one who breasts the tape first wins.