When Islam rose, it was the two great empires in the Middle East. Sassanbos and the orthodox Byzantine Empire of Greece struggled with each other for hundreds of years and were exhausted. During this period, the Islamic order took advantage of the situation, and its expanding forces destroyed Sasan, conquered Byzantium, defeated the troops of China in the Tang Dynasty in the hinterland of Asia, and bypassed the Mediterranean Sea to the south, occupying the northern shore of Zhou Bei. From the hinterland of Asia to North Africa, it is ruled by Islamic regime. Although there are sometimes internal power struggles or dynasty changes, the belief system of Islam has indeed occupied the whole Middle East and its surrounding borders of Europe, Asia and Africa, and this region is precisely the hub of long-distance trade between East and West. So at that time, Islamic forces mastered rich resources.

The motivation for Europeans to open up new navigation channels is that Islamic forces intercept merchant ships from the East and the West in the Middle East, which makes eastern goods flow into the European market at very high prices. Therefore, Portugal and Spain along the Atlantic also want to seek rich profits in the market where foreign goods can survive. It is precisely because of the great voyage that European countries have achieved the leading position in the world and dominated the world. The rise of Islam reminds me why the Manchu Dynasty was able to rise, and it was also because Mongolia and the Ming Dynasty fought for a hundred years and their national strength was weak.