This actually lacks a lot of things. What is most lacking is high-performance aero engines, which is almost 20 years behind the United States. In terms of design, the gap between it and the United States is no longer big, and it has even surpassed Europe and Russia in terms of fighters, early warning aircraft, and drones. Radar is also close to the level of Europe, the United States and Russia. However, in the design of large aircraft, it lags behind Europe, the United States and Russia. After all, our large aircraft started too late. The mastery and application of new materials and new processes is somewhat worse than that of Europe and the United States, but better than that of Russia. It lags behind Europe, the United States and Russia in terms of the high-skilled workers required for aircraft production. In terms of the operation of the entire aviation system, the efficiency of the management system lags behind that of Europe, the United States, and Russia. It lags behind Europe, the United States and Russia in terms of R&D investment. It lags behind Europe, the United States and Russia in terms of export sales of aviation products worldwide. In short, the gap is multi-faceted. Technical things are easy to handle. As long as you spend money and time, you can catch up with the Chinese people in about 10 years with their wisdom. Management problems are much more complicated. Just like Chinese football, it cannot be solved by changing one or two players and coaches. To completely solve it, it will inevitably affect many people and touch the interests of many people. Of course, China Aviation’s problems are far less serious than those of Chinese football. Here is just an example. Purely hand-made, hope you can adopt it.