What is the government's role in socialism?

Controlling and regulating the production and distribution of the products

Explanation:

In a pure socialist system, all legal production and distribution decisions are made by the government, and individuals rely on the state for everything from food to healthcare. The government determines the output and pricing levels of these goods and services.  

Explanation:

I got it from a website that gives answers

the great wall of china worked as a defense for the feudal states of the zhou dynasty to the north. during the warring states period more walls were put up to defend the borders of the different kingdoms. it was semi successful because despite the wall, the mongols eventually conquered china also the great wall provided protection to the economic development and cultural progress, safeguarded the trading routes such as the silk road, and secured transmission of information and transportation. @jayxboof