>Anything that sounded like the emperor's name could not be kept or killed. The ban had a productive outcome, because it resulted in the development of polyculture, growing multiple species in the same ponds.
Haha. I love China
>The Tang Dynasty (618 - 907), with its capital at Chang'an (present-day Xi'an), the most populous city in the world at the time, is regarded by historians as a high point in Chinese civilization—equal to or surpassing that of the earlier Han Dynasty—as well as a golden age of cosmopolitan culture. The enormous Grand Canal of China, built during the previous Sui Dynasty, facilitated the rise of new urban settlements along its route as well as increased trade between mainland Chinese markets. The canal is to this day the longest in the world. In two censuses of the 7th and 8th centuries, the Tang records stated that the population (by number of registered households) was about 50 million people. However, even when the central government was breaking down and unable to compile an accurate census of the population in the 9th century, it is estimated that the population in that century had grown to the size of about 80 million people. With its large population base, the dynasty was able to raise professional and conscripted armies of hundreds of thousands of troops to contend with nomadic powers in dominating Inner Asia and the lucrative trade routes along the Silk Road. Besides political hegemony, the Tang also exerted a powerful cultural influence over neighboring states such as those in Korea and Japan.