The Four Great Inventions of China

The four major disciplines are Medicine, Astronomy and Calendar, Mathematics, and Agriculture

The Four Great Inventions: Gunpowder, Compass, Printing, and Paper

The Three Major Technologies: "Smelting Stone for Weapons, Thousands of Furnaces Set Up Together," and Clay Casting

"Smelting Stone for Weapons, Thousands of Furnaces Set Up Together", a famous poem by Cao Bi of Jin, truly depicts the production of smelting and casting in ancient China.

"Smelt stone for ware, a thousand furnaces are set up", Jin Cao Bi "Wing Metallurgy Fugue" of the famous poem, a true depiction of China's ancient casting and smelting production scenarios. In China's ancient metal processing technology, casting occupies a prominent position, with a wide range of social impact, like "model", "pottery and metallurgy", "melting and casting", "on the model" and other idioms, is the terminology used in the casting industry. Laboring people through generations of long-term production practices, creating a traditional casting process with our national characteristics. In particular, the mud model, iron model and molten mold casting is the most important, called the ancient three casting technology.