Cough!
After seeing the massive gains that Great Qin had made, Zhao Fu had wanted to laugh, but he suddenly tasted a sweetness in his throat. He coughed up a mouthful of blood. His injuries from just then weren't light at all.
Zhao Fu decided to rest for a few days – he had been working quite hard the past month, and he had remained at the center of the ocean of bones almost every day to protect the Disaster Cavalry. His mind had been incredibly tense, and he hadn't relaxed at all.
Moreover, after destroying the four system main cities and obtaining their City Creation Stones, there would be a lot to take care of, so he decided to return to Great Qin.
Zhao Fu had the Undead army remain in that region for a few days while he returned to Great Qin. He gave the large number of corpses and the countless pieces of equipment to Li Si and Ba Qing to take care of.