C1112 Slave Human.

"The anti-gravity device, as the name implies," Red Queen said simply.

Yang Xuan nodded. There were many technologies in the world of science and technology, but only a few could be used in practice. Furthermore, it was extremely rare to be able to lift such a large city in the air.

"This thing is good. With our current technology, we can only suspend some small objects."

"That's right