What do you mean by "selfless dedication and no regrets, overflowing with Dan Xin and bursting with youth"

dedication: show it respectfully. Sprinkle: things fall to the ground scattered. Bloom: open. Fanghua: fragrant flowers. Sentence meaning: without any selfishness, I will never regret presenting all my respect, and my sincere heart everywhere will open beautiful and fragrant flowers. These two poems praise dedication with personification, and the dedication of Dan Xin brings the beauty of "blooming flowers".