Xia died in Hanzhong in the battle of Dingjun Mountain, but why was the cemetery in Xuchang?
Xia is the general of Cao Wei camp, and the brother of Cao Cao, that is, blood relationship. So after Xia's death, his soul will of course return to his hometown. But now Cao Cao and others are still in Xuchang, busy with the war, so they have to build a cemetery in the summer in Xuchang first, and then bring his soul back to his hometown when the country is unified in the future, and choose a geomantic treasure house for burial.
As the master of Xia, Cao Cao is his own brother, and his feelings for Xia are definitely higher than those of other generals. So after his death, Cao Cao could not be buried in situ. Be sure to take him back to Xu Changcheng and bury him first. When he wins in the future, take his brother back and bury him in his hometown.
Now it is possible that Huang Zhong is at war with Xia in Dingjun Mountain. Huang Zhong is a general of Shu and one of the five generals of Shu and Han, and his combat capability should not be underestimated. In this campaign, I heard that Huang Zhong returned home with a great victory. Many people annihilated Cao Wei's army, and Xia was beheaded by Huang Zhong. I believe anyone who has watched the TV series Romance of the Three Kingdoms knows that Xia's head was cut off by Huang Zhong and brought to Liu Bei's face, which was extremely bloody. I believe his body doesn't know where he went.
Therefore, after Cao Wei's people arrived, even Xia's body could not be identified, let alone buried on the spot. Helpless, a cemetery was built in Xuchang, which read the tomb of Xia. This means that even if Xia's soul can return to Cao Cao.