China people invented the compass but used it to watch Feng Shui, and invented gunpowder but used it to make firecrackers! The same invention has different experiences. What does this mean?

There is still one thing that the landlord didn't see. Compasses used for navigation are not exclusive to westerners. Hundreds of years before Columbus sailed into the Atlantic with a few shabby boats, Zheng He's fleet had appeared in the vast Indian Ocean. The magic weapon of gunpowder indirectly led to the end of the cold weapon era (described below).

We are familiar with four great inventions: papermaking, printing, gunpowder and compass. In Marx's view, it led to the arrival of western bourgeois society. Paper-making (and its derivative printing), after being introduced to Europe by Arabs, brought earth-shaking changes to the ignorant Middle Ages. Due to the high development of printing industry, knowledge is no longer in the hands of the church, which shakes the authority of the Holy See, and a large number of people falsely accused by the Holy See as "heretics" have emerged: Copernicus, Galileo and Bruno have made great contributions to defending the truth.

Gunpowder, when skilled technicians from China, Persia and Europe combined China gunpowder, Muslim flamethrower and practical European bell casting technology, created a "cannon" and sounded their own death knell in the Middle Ages when iron bullets shattered solid castles and foolish chivalry. At the same time, this weapon was sent back to China and was widely used in the early Ming and Qing Dynasties. Remember that "invincible general"?

Finally, the compass, The Travels of Marco Polo in the14th century caused a sensation after its publication in Europe, and people boarded the ship one after another, trying to make a fortune in the rich East. However, due to the bad relationship between the Christian world and the Islamic world, the traditional Silk Road connecting Asia and Europe was cut off, and the capitalists had to detour the Arabian Peninsula and cross the choppy Atlantic Ocean to reach Asia. The earliest attempts came from Portugal and Spain on the Iberian Peninsula. It is because of the compass that the British can get out of that narrow world. So as to establish colonies all over the world. The nickname is "the sun never sets".