Correct

辚辚

/ lín lín / 
Strokes

Example

As an Onomatope

rumble ［sound made by a running cart or chariot］

1
Chē
车
línlín
辚辚
  
,
mǎxiāoxiāo
马萧萧
  
。

Trilling, trilling the chariots, and neighing, neighing the steeds.