What does the ancient poem Crossing the Watershed mean? I just want poetry, not other irrelevant content!

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Crossing the Watershed by Tang Wen Ting Yun

The stream is heartless and affectionate, and I will walk with you for three days.

Lingtou is the place to leave, saying goodbye to the night's whispering.

The stream is heartless, but in the three days I entered the mountain, it kept walking along its own side, as if on purpose. Therefore, when I climbed the ridge and prepared to leave the stream, I couldn't help feeling farewell.

Crossing the Water Pass is a famous seven-character quatrain written by poets in the Tang Dynasty. This poem describes the author's relationship with the stream and his feelings when crossing the watershed.