But at the end of the day we want to understand that China's isolation is going to be really important to their growth in terms of them seeing themselves as the center of the world and also that there's going to be much less trade with the other civilizations. But if you remember anything, remember the power of water. The Huangshi River, the Yellow River in 1887, it flooded, killed like I don't know a million people. That's how powerful it is. So let's go back in time and see how these early people of China mastered the water. So let's start in the very beginning. You probably don't want me to start in the very beginning because we have found our evolutionary ancestors in the land known as China that are two million years old.