They're also at the forefront of things like music and calendar systems, mathematics, astronomy. So at the end of the day, the ancient Chinese, the Shang Dynasty, they're going to be the bomb, but they're not going to be the bomb forever because of something called dynastic cycles, which I have to explain to you in the next section, which we're going to do right now. All good things must come to an end. And I'm telling you, the Shang, 500 years. They had a 500 year run. 500 years is a very long time, but eventually their day is going to come and they're going to be replaced by the next dynasty, which is called the Cho Dynasty, the vocab right up on the wall. And they're going to rationalize them taking over because really they're going to keep a lot of the Shang culture.