I understand this separately. Kaku Takashina should refer to the part with Jian 'an character in Cao Zhi's poems. Hua Mao should be based on his articles, and Luo Shenfu is the representative. This should mean that his poems are affectionate but not vulgar. Finally, the ancients paid more attention to the relationship between literature and quality. This sentence should mean that Cao Zhi combined literature and quality very well, and there was an ancient pursuit of literature:
Confucius said, "Quality is better than literature, and literature is better than quality. Gentleness is a gentleman. " -"The Analects of Confucius Yongye"