Correct

车水马龙

/ chē shuǐ mǎlóng / 
Strokes

Definition

endless stream of horse and carriages (idiom)/heavy traffic

Example

Definition

unending/endless stream of horses and carriages—flow/flux of traffic; heavy/dense/thick/congested traffic (in the street); be crowded with vehicles

1
Nàge
那个
jì
骑
zìxíngchē
自行车
de
的
rén
人
zài
在
chēshuǐmǎlóng
车水马龙
zhōng
中
yūhuí
迂回
chuānxíng
穿行
  
。

That cyclist was weaving his way through the busy traffic.