Just after the speech, everyone clapped their hands. Of course, the happiest person was Ye Tian. He had a little research on archaeology, and the lecturer was his favorite old Chu.

then the head teacher left. Mr. Chu began to talk. He said with a smile: "Hello, everyone, I'm very glad to have a class with you young people. I'll take you into the mysterious archaeological world and let you know more about the geographical history and economic development history of the country and the world, as well as the mystery of different regions Solve the mystery. "

Mr. Chu is talking with high spirits, which makes everyone here interested....