Four great inventions of ancient china, which is the most useful?

Among the four great inventions in ancient China, I think the compass is the most useful. The guide has a far-reaching impact on China and the world. Through the compass, the world is connected as a whole.

1. The compass helped Zheng He to sail to the Western Ocean, which had a great influence in the history of China. It was through Zheng He's voyage to the West that he achieved? Maritime Silk Road? It was because of Zheng He's voyage to the West that China began to exchange and trade with overseas countries. At the same time, it publicized the culture of China and showed the prosperity of the country at that time.

At that time, the compass was not called compass, but Sina. This provided the necessary technical support for Zheng He's voyage to the West. Without it, Zheng He could not have made a pioneering trip to the West that shocked the world, nor could he have opened it up? Maritime Silk Road? , also can't make overseas Chinese immigrants develop rapidly. With the help of Sina, Zheng He successfully sailed to the Western Ocean, which had a great influence on the development of China.

2. Compass helped Columbus discover the new continent. Columbus discovered the new continent and opened up a new navigation route, which was the beginning of the navigation era. It is precisely because Columbus discovered the new continent that European countries found new economic sources, helped European countries out of the dark Middle Ages and ushered in a new beginning. The discovery of the new continent also makes the world more like a whole. Various crops have also begun to spread, such as tomatoes and potatoes. It has begun to be known that it is these new crops that have kept more people alive.

Without a compass, even if Columbus discovered the new continent, he could not find his way home in the vast sea. It will not open up navigation routes, nor will it spread crops from the American continent to medieval Europe. Therefore, the guide has a great influence on the world.

Compass turns the world into a complete compass, which helps people navigate and find directions in the sea. At that time, the plane had not been invented, and the only way to make the world a whole was by sea. Navigation routes must be opened up with the help of compasses. Without a compass, who can find the direction in the vast sea? The compass opens up a new route and makes the world a whole, so it can be said that the compass makes the world a whole.

So, in my opinion, the compass is the most useful.