Correct

沿河

/ yán hé /
Strokes

Example

As an Adverb

along the river

1
Shuǐliú
水流
chōng
zhāo
xiāngzi
箱子
yán
沿河
ér
xià
  

The current swept the box down the river.

2
Yán
沿河
ér
shàng
  
/
ér
xià

follow the river up/down; go upstream/downstream