The circle of friends driving in foggy days is talking about poems that cannot be seen in foggy days.

"The fog locks the river, and the boat rushes to the evening breeze", "The morning fog is diffuse and there is no trace, so it is difficult to hide everything".

"Fog locks the river, and the boat is in a hurry to go to the evening breeze": "Fog locks the river" describes the scene where the river is full of fog and the fog is so thick that it is almost invisible. The "first-line model" vividly expresses that the vision is limited and only hazy lines can be seen, which makes people feel confused and confused. "Lonely boat comes to the evening wind": Here, the lonely feeling of the poet in the fog is implied by "lonely boat", and at the same time, the time is pointed out by "evening", and "wind comes quickly" strengthens the tension and uneasiness of the environment. Generally speaking, this poem gives people a sense of loneliness and helplessness in the face of the night wind and fog.

"There is no trace of morning fog, and everything is hard to hide": "There is no trace of morning fog": it describes that the morning fog spreads, covering all the scenery and making everything around it lose its trace. "Traceless" emphasizes the dense fog and shielding effect. "Everything is hard to find if it is hidden": further emphasize the influence of fog, so that everything is hidden and difficult to find or find. "Difficult to find" expresses the trouble and inconvenience caused by fog.