His surprise was due to Shen Yue.
Goring explained the entire situation and then waited for Shen Yue's decision.
He wasn't in a hurry, as Shen Yue was always the one on the clock. All he had to do was wait for Liszt to deal with Nuanyu.
No matter whether Liszt could handle Nuanyu or not, the reappearance of "moon corners" would allow them to use the current situation to accumulate more of them.
With patience, they could further increase their advantage.
Rome wasn't built in a day, and advantages accumulate bit by bit.
Shen Yue is a smart person. There's no reason for him not to understand this. However, to Goring's surprise, Shen Yue seemed somewhat different after hearing the facts.
Shen Yue was injured!
He had attempted to remove the nanobots from his body but was injured in the process. Blood flowed from his nose and mouth, indicating his condition.