What social phenomenon does the market reflect?

Monopoly: patent, monopoly. Monopoly market: refers to the mutual market established by Liao, Song, Xixia and Jin regimes in the border areas of China. Monopoly trade is produced by the need of economic exchange in various regions. For the rulers of political power, it also has the functions of controlling border trade, providing economic benefits, and securing the border and retreating to the future. Therefore, the setting of monopoly field is often changeable because of the change of political relations.