交换的一天 韩语中字

At this time, Ning Cheng was really grateful to Old Man Xingkong. If the old guy hadn't let him enter the cabin to study for a while, he would have been unable to start with such a high-tech starry battleship. If you understand technology, you will understand it. If you don’t understand it, you will not understand it. There is no such thing as enlightenment....