What is the reason why grandpa likes plum blossoms in the lesson "Plum Blossom Soul"?

Plum blossoms are not afraid of the cold in winter. When all the flowers have been carved, they bloom against the flying snow. This lofty character is just like the patriotic spirit of the old overseas Chinese. The more difficult it is, the deeper the yearning and love for the motherland will be. Therefore, grandpa, who is deeply loved by the motherland but has left the motherland for many years, especially loves plum blossoms, which symbolizes this spirit.