The commercial revolution has strengthened the economic and cultural ties between regions, further expanded international trade, and changed trade routes and trade centers (the trade routes moved from the Mediterranean coast to the Atlantic coast, and Italy's position as a commercial center was replaced). It can also be called a business crisis.
In addition, it is mentioned that the commercial crisis is the reason for the opening of new routes, and the poor commercial roads have led to the commercial crisis. The Ottoman Empire controlled the main trade routes between the East and the West and blocked the traditional trade routes of western European countries to the East. Western European aristocrats and emerging businessmen who are crazy about pursuing oriental wealth (gold, jewelry, spices, silk, etc.). There is an urgent need to explore a direct sea route to India and China.