The middle class were people who were educated and could have open companies or knew how to run companies for rich investors. The working class was the class that would do the physical part of the manufacturing process in the industrial revolution. This enabled the middle class to earn some wealth and establish itself.
The Silk Road extended approximately 6,437 kilometers (4,000 miles) across some of the world's most formidable landscapes, including the Gobi Desert and the Pamir Mountains.