Politically, there is a separatist situation in the buffer region, which seriously weakens the centralization; The scientific research system tends to be perfect in the system of selecting officials.

Economically, the economic center began to move south, and curved plows appeared in agriculture, and the plowing technology was perfect. In handicraft industry, there are two major porcelain making systems, namely "blue in the south and white in the north". Commercially, rural fair trade has also developed, and cabinets and flying money have come out one after another.

From a cultural point of view

Too much help, so I had to sit down. I'll make it up later. If I had a colleague, I would thank you.