What did China people invent in the past century?

1, millet cultivation and rice cultivation: China is one of the three centers of agricultural origin in the world. About 10,000 years ago, the agricultural revolution focused on grain cultivation, which greatly promoted the development of ancient civilization in China. Millet is dominant in the north and rice is dominant in the south, both of which are native to China. "Food is the most important thing for the people". The earliest people in China grew up eating millet and rice.

2. Decimal notation: Every decimal number is determined by its position, which is called decimal notation. China used this method in the Spring and Autumn Period at the latest, which can be used as four operations. This is an original great invention of China people in the field of mathematics. Now, the decimal system is adopted all over the world. "If there were no decimal system, the world would be different," some scholars said.

3. Bronze smelting and casting: Although the bronze civilization in China is relatively new, it is backward in technology and self-contained. The original wood structure support, shaft furnace, "sulfide ore-matte" smelting process, separate casting method, EPC method and other technologies. They were first invented by miners and casters in the pre-Qin period.

Iron and steel smelting technology based on pig iron: China invented pig iron smelting and casting as early as the late Western Zhou Dynasty. On this basis, the people of China have developed a unique and advanced iron and steel smelting and processing technology, such as permanent mold casting, cast iron softening, iron frying and steel casting. , thus creating a brilliant steel civilization and providing a technical and material basis for the social, economic and cultural development from the Warring States to ancient times.

5. Papermaking: Papermaking was invented in the Western Han Dynasty. Its popularization and application fundamentally changed the writing carrier and inheritance mode, and made great contributions to the development of world civilization. Traditional handmade paper is still spread all over China, playing an important role in cultural undertakings and people's daily life.

People's Network-How much do you know about China's great inventions?