Literally, this poem describes a man sighing his past grievances under the bodhi tree, hoping to change his fate after waking up from alcohol. He stood in the pavilion in Yantai, Langya, watching the moon after the rain and feeling his own destiny. His sadness and tears, like faint dew, fell into the harp.
But this is only a rough explanation. To understand this poem accurately, we need more background information and context.