What inventions can be called black technology in ancient times?

As one of the four ancient civilizations in the world, China is not in name only. China's invention has a great influence on the development of history and the world. China's four great inventions, such as papermaking, gunpowder, compass and printing, are world-famous. These four great inventions have not made much contribution to China today, but have been carried forward by other countries.

However, China also invented many black technologies by using these four inventions, which can also prove that China is a democratic country that loves to play and gossip. First of all, the invention of gunpowder has the greatest influence on the world. Developed countries in the world use gunpowder to make explosive weapons and strengthen their own war capabilities. China, on the other hand, uses gunpowder to make firecrackers, which is just one of the ways to entertain the public.

China invented the compass. We all know that Columbus used it to sail and discover the new continent, but we ancient China people used it as a compass. It's nonsense to say fortune telling. Combining these two points, we can see how big the hearts of China people are.

However, we also need to admire the wisdom of the ancients. For example, a humanoid lamp unearthed in the tomb of Hanwang can be seen from the appearance that the lamp is very exquisite in workmanship, but it actually contains Gankun. This kind of lamp was produced in the Han Dynasty, and the inner wall of the characters was completely hollowed out. After lighting, the smoke of the lamp will not pollute the room, but through the internal circulation of the lamp itself, and all the water is at the bottom of the lamp. So it can play the role of purification, which is the crystallization of the wisdom of the old ancestors.