What does the second half of the poem mean, "I like Yanran to play high, but I still think Qufu sings low"?

"Ran Yan is strangled": This allusion comes from Dou Xian, a general of the Han Dynasty. In those days, Dou Xian pursued Xiongnu to Ranyanshan, and bridled the stone to record merit. It can be seen that this couplet is implying that the landlord of the Zhang family has the merit of lying down foreigners. Combined with the background of the times, it is probably the general sent by Emperor Daming to fight in this area. Later, due to the policy of changing land into streams, he settled here and managed the Yao people.

Thinking of Qufu: I have always ignored the meaning of this sentence before. "Qufu", according to the Notes of Ignorant, the ancestor of Lu was Zhou Gongdan's eldest son, Boqin (named Earl). Qufu (now Qufu City) has its capital. It was one of the largest vassal States when it was enfeoffed in the early years of the Western Zhou Dynasty.

The meaning of the whole sentence is: Although barbarians have been defeated and triumphed, Lu's thoughts are silent.

Inference: The landlord of the Zhang family is indeed a descendant of the king of Lu regression.