The Western European serfdom is one kind of economic forms in Western European feudal society, and it was suitable for the self-sufficient manorial economy.
中世纪西欧农奴制是西欧封建社会的一种经济形态，与自给自足的庄园经济相适应。
2
Huizhou salt merchants in the Ming-Qing period were the products which the late feudal society changed from natural economy to commodity economy.
明清时徽州盐商是晚期封建社会由自然经济向商品经济变革的产物。
3
The flourishing period of the Tang Dynasty is a historic period in China's feudal society, which created prosperous economy and magnificent civilization.