What does Lu Guozhan mean by writing sunflower lyrics?

Lu Guozhan should bravely face the ups and downs of life when writing the lyrics of Sunflower. According to relevant public information, Sunflower is a poem by Lu Guozhan. The author uses this poem to convey the meaning that people should bravely face the ups and downs in life and continue to live after a long time. Lyrics express that when people encounter difficulties, they should be their own sunshine, move forward bravely and pick up hope again.