When Cao Cao slaughtered the city, did he only slaughter Xuzhou or the whole city?

I also think this is just a massacre in the past, because in the later period, Cao Cao used soldiers from Qing Xu in his struggle for world hegemony. For example, Zhuge Liang and Zhou Yu also said that Cao Cao was mostly a soldier of Qing Xu and was not good at water warfare. And it may never be as serious as a massacre. It should be regarded as burning and looting along the way. The troubled times of the Three Kingdoms are very common. As we all know, before Guandu, Chen Lin wrote a letter to Cao Cao to recruit thieves. If Cao Cao really slaughtered Xuzhou, it would be a powerful excuse and weapon to attack him. But the word "Xuzhou" in the appeal for attention shows that it is not a real massacre. The book about Cao Cao's massacre in Xuzhou is undoubtedly the book of the later Han Dynasty (based on the biography of Cao Zang, written by Wu people). On the contrary, the books written by the Three Kingdoms are much more objective and credible, and the heaviest sentence is that everything is ruined. According to the documents recorded in the Three Kingdoms of Tao Qian, most people died in this war disaster. Instead of killing people directly.