C671 The Great Protector of the Human Race

After two hours, Zhao Lin's back was already covered in cold sweat. This old man was too powerful. Zhao Lin was getting more and more strained. His knowledge was no longer able to keep up with the old man's.

"All of you, wait for me outside."

Zhao Lin knew that the topic of discussion was not suitable for the two girls to hear, so he instructed the two girls