Caterpillar was founded in 1925 after its production of track-type bulldozers, motor graders, generator sets and specially licensed engines for M4 tanks were used in U.S. warfare. In the early 90s, a modern production project was launched at a cost of 1.8 billion to make the manufacturing process smoother. In 1985, due to the backwardness of China's construction machinery technology, the Ministry of Machinery Industry of the People's Republic of China decided to set up an office for the introduction of Caterpillar technology (referred to as "Caterpillar Office") to organize 12 domestic enterprises to participate. As a national key introduction project, it is no exaggeration to say that the well-known construction machinery factories in China have received technical assistance from Caterpillar. Today, Caterpillar remains the world's largest manufacturer of construction machinery and mining equipment, one of the manufacturers of gas engines and industrial gas turbines, and one of the world's largest diesel engine manufacturers, ranking 194th in the world's top 500. Technology leadership is Caterpillar's biggest advantage, and it has maintained a leading position in product technology for a long time. It spends 5% of its total sales on technology research and development every year, investing billions of dollars, ranking first in its peers. Caterpillar excavators are characterized by durability, high efficiency, strong performance, and excellent digging force, but high fuel consumption, average maintenance, and expensive accessories, which are most suitable for use in mines, stone quarries, etc.