bā shān yè yǔ
Interpretation: It refers to the loneliness of being a guest in a foreign land and being caught in the night rain.
Source: Tang Li Shangyin's "Send the North by Night Rain": "You have not yet set a date for your return, but the rain on Bashan Mountain rises in the autumn pool. When I cut the candles in the west window, I would say that it is raining at night in Bashan."
Structure Partial Formal
Usage As object, determiner; used in writing