When you look at it on the timeline like this that's covering over 2,000 years, it might not look that long, but when you actually think about it, this is over 300 years of dynastic rule by one dynasty. Now it is split in the middle between the Northern Song and the Southern Song that happens in 1127, and we'll talk about that in a little bit. But for the most part, it is a very prosperous time for China. The population actually grows from roughly 50 million people during the Tang Dynasty to, it is estimated 100 million people by the Northern Song Dynasty, and eventually keeps growing so that by the time we get to the Ming Dynasty, we have a population of about 200 million people. So what are the things that allows for that population explosion, really? Well, one thing you can imagine is food is very important. And it's during this time period that the Song Dynasty is able to leverage a more robust rice seed from Southeast Asia that allows it to feed many, many more people.