1. Compass was mainly used by Mr. Feng Shui in ancient times to photograph houses and graves, as well as navigation and others. It is the latter that has played a great role in the progress of human society, so the compass can be ranked among the four great inventions in ancient times.

2. Used for navigation. The ancient books in China recorded that the compass was used for navigation, beginning with Mi Zhu's Zhou Ping Kertan in Song Dynasty,1119. The book says: "A boatman knows geography, but he looks at the stars at night, the sun during the day and the compass at dusk."

3. In the navigation activities, the compass is popularized quite quickly. This invention was later introduced to Europe through Arabia, which had a great influence on the navigation industry in Europe and even the civilization process of the whole human society.

In the military field, the compass has also played a great role, so that the army can determine the direction and not get lost.

Extended data

The compass opened the world market.

The application of compass in navigation has greatly promoted the great geographical discovery and maritime trade. The invention of the compass originated from the study of how the ancient people in China oriented, and also showed that the ancient people attached importance to how to orient. Therefore, the compass is known as one of four great inventions of ancient china.

In ancient China, compasses were used for military and maritime activities, and also for geomantic omen theory. Later, it was introduced to Europe, which played an irreplaceable role in European navigation and geographical discovery. In the invention of navigation technology, compass is also the most important single invention.

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