沿 + Noun + Verb
The preposition 沿 (yán) means 'along' and is used to describe movement following a path, river, road, or boundary. For example, 沿着河走 means 'walk along the river.' It indicates direction or proximity to a linear feature.
我们沿着这条街一直走就到了。
Wǒmen yánzhe zhè tiáo jiē yìzhí zǒu jiù dào le.
We just keep walking along this street and we'll get there.
沿河两岸种满了樱花树。
Yán hé liǎng àn zhòng mǎn le yīnghuā shù.
Cherry blossom trees were planted all along both banks of the river.
她喜欢沿着海边散步。
Tā xǐhuan yánzhe hǎibiān sànbù.
She likes to take walks along the seaside.