沿 (yán) means “along; to follow (a line, tradition etc); to carry on; to trim (a border with braid, tape etc); border; edge”. It is an HSK 6 Chinese character in the HSK 3.0 vocabulary.
他沿着河边散步。
Tā yánzhe hé biān sànbù.
He took a walk along the river.
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