What are the first two sentences in Meng Yunqing's Cold Food in dealing with the relationship between scenery and emotion?

These two poems, one about prosperity and the other about sadness, express the poet's extreme sadness of spending a cold food festival in a foreign country with the technique of "writing sadness with joy".

An outdated festival (Qingming Festival) that started one or two days ago in Tomb-Sweeping Day, when only cold food is served for three days.

Meng Yunqing

Jiangnan in February is full of flowers, and cold food in other places is far from sadness.

Poor people often don't have fireworks, not only in the Ming Dynasty.

Note (1) Cold food, seasonal name, the day before (two days before) in Tomb-Sweeping Day. According to legend, it started in Jin Wengong. In order to mourn the death of meson tui, meson tui was burned to death with firewood, so it was scheduled to ban fire and cold on this day.