Type III fighters such as J-20 are on the cover of primary school textbooks. What do you know about these fighters? Made by Cheng Fei, a subsidiary of AVIC, the J-20 is a standard fourth-generation fighter. At present, there are only three countries in the world that can build fourth-generation aircraft: China, the United States and Russia, F22 and F35, and Russia is Su 57 (Western countries don't think Su 57 is a fourth-generation aircraft because its stealth performance can't meet the standard). The appearance of J-20 successfully sent China into the first echelon of advanced fighter manufacturing, which greatly enhanced the international image of China's military industry. China's arms exports used to be synonymous with low-end and low-price. The installation of the J-20 proves that China not only produces low-end armaments, but also does not lose high-end armaments. In recent years, China's weapons such as missiles, submarines, fighter planes and drones have won a good reputation in the international market, and the appearance of the not-for-sale J-20 has made international buyers sit up and take notice.

Stealth fighter manufacturing is a complex and huge system integration project, and it is also the embodiment of a country's comprehensive national strength. An airplane includes radar, avionics, stealth materials, power, weapons and other subsystems. Each system is a huge project, and it is even more difficult to integrate each system. It is difficult to accomplish without a strong comprehensive national strength. South Korea, Turkey and India declared that they would build the fourth generation aircraft, but all of them were much cry and little rain, and only produced drawings. The Japanese-made Mind Fighter claimed to be a fifth-generation fighter, but it turned out to be only a technical verification, and it was a bargaining chip when buying fighters from Americans! Japan is still very advanced in many fields of fighter manufacturing. Some key parts of the American stealth fighter were provided by Japan, but due to the lack of machine manufacturing and system integration capabilities, it could only be stillborn.

The development of J-20 can not only promote the development of military manufacturing, but also promote the development of civil economy. The advanced technology in the world is often first applied to the military field, such as computer, Internet, GPS, etc. The economic benefits generated by its application in the civil field are immeasurable. The production of J-20 requires more and more high-performance engines, and the turbofan engine developed for J-20 is not far from assembly, which will certainly have great reference for the production of civil engines in the future. The J-20 is more than just a fighter. For China, which is catching up with the world's advanced aviation manufacturing, its role cannot be explained by the aircraft itself.