What is the meaning of "firecrackers are one year old, and spring breeze seems to warm thousands of households in Tu Su, and new peaches are always replaced with old ones"?

This poem is called January Day, which was written by Wang Anshi in the Song Dynasty. It means:

In the firecrackers, the old year has passed; The warm spring breeze ushered in the New Year, and people drank Tu Su wine in the warm wind. The rising sun shines on thousands of families, who are busy taking off the old peach charms and replacing them with new ones.

Extended data:

This poem vividly describes the scene when people bid farewell to the old year and welcome the new year during the Spring Festival. A piece of firecrackers sent away the old year, drinking mellow Tu Su wine and feeling the breath of spring. The rising sun shines on thousands of families, and every family's peaches are replaced with new ones. This is a typical impromptu work to welcome the New Year in ancient times. Based on folk customs, it sensitively absorbs the typical materials of ordinary people during the Spring Festival and captures the representative details of life: setting off firecrackers, drinking Tu Su wine and changing peach symbols, which fully shows the joyful atmosphere of the New Year Festival and is full of rich life breath.