The core of CNC system is not chip, but algorithm, which is code optimization. Only in this way can we achieve the accuracy and stability of the numerical control system ... As for the electromagnetic compatibility of the numerical control system, it is a trivial matter in front of the algorithm. Siemens, a motion control card can get us stuck. Mechanical systems have many cores, not to mention materials. In the structural part, we always think that machinery is a sunset subject, but every time foreigners come up with a new structure, we stay. So this thing can still be like this! What reconfigurable concept, mechanism, static and dynamic structural optimization theory, spatial motion analysis decoupling, etc. People have found the doorway and their computational mechanics ADAMS has become commercial software. Our computational mechanics, besides the contribution of Academician Zhong, is like a wake-up call for me. I don't know if others are still lying in their papers. I'm afraid I'm not very proficient in dynamics. People who know ABAQUS ANSYS probably have a little knowledge of the numerical calculation of elasticity. Although they can use it, they can also see which one is optimized. Well, we are repeating past experiences, and even some experiences should have been defeated by the disease. People are digging up theories. Functional parts, the angle milling head is ok now, but what about the double pendulum head and universal milling head? The motorized spindle is another trouble, and the motor technology is still standing in the pit. You have to work harder, or the coil will make the torque motor cry. Everyone who knows it knows that buying imported machine tools, five-axis systems and nano-precision CNC systems is the boss, and spending a lot of money depends on the face. I feel extremely uncomfortable writing them a letter of guarantee. Today, the development of machine tools can be said to be almost standardized and specialized. The problem is that after this specialized division of labor, the core keys are distributed to foreigners. Export is progress, and it is worth beating gongs and drums to dance square dance. You can't bridge the technical gap just by dancing in your brain. It is said that square dance is too disturbing to dance all the time. I don't know who owns the bearings, coils, encoders and functional parts of the exported machine tool. I don't care about the news, the gap, the connotation and the reality of spring. Doing basic research in a down-to-earth manner is easier to break the technical blockade than writing a press release, but it is difficult to sit on the bench, and it is even harder to spend money without making money. It's really hard not to sow seeds in the morning and cut wheat at noon.