In Wang Anshi's poem "Plum Blossoms", "Ling" in "Linghan blooms alone" is an adjective, meaning cold, and is related to Lingdong (cold winter), Linglie (cold), Lingjing (cold) The meaning and part of speech of Ling in Ling Ling (cold appearance) are the same.
A few plum blossoms in the corner bloomed alone in the cold winter. A few plum blossoms in the corner bloomed alone in the cold winter. Linghan: a compound word with synonymous combinations, describing the coldness of winter.
"Linghan" is the environment and background where the plum blossoms bloom proudly alone in the corner. It is a metaphor for the extremely complex and difficult situation in the Northern Song Dynasty. It is a portrayal of the poet's obstruction of the reform proposal.
As for the explanation of "lord" in Lu You's poem "Loneliness opens without a master", it is difficult to fully understand it in a few words, so it can be explained in another topic.