Beauty is always a hero. According to the relevant information of the query, the next sentence that safflower needs green leaves is that beauty has been matched with heroes since ancient times. It means that beauty and hero are a natural couple, just like red flowers need green leaves to set off, which is a tacit match. This sentence is used to describe the pairing of heroic men and beautiful women, or the pairing of excellent men and excellent women, emphasizing mutual complementarity and cooperation.