The Netherlands is probably the most advanced country in the world in manufacturing lithography machines. The epidemic in the Netherlands is very serious now. Russia once gave a great help and encouragement, or suggested to the Netherlands to use Dutch supplier machines. Change our masks, because medical resources are very tight now, especially masks and protective clothing. There is still a gap between our country and the world's first-class level in the research and manufacturing of optical technology. We continue to do business with the world, and with economic exchanges, we naturally know what level other countries are at. Large optical passenger aircraft are highly accurate. Optical passenger aircraft play a decisive role in the scientific and technological progress of our country. For example, the chips we use in mobile phones and computers now, whether our mobile phone chips use 8 mm, 6 mm or 5 mm, depends largely on How advanced is the lithography machine? We do not have a particularly high-precision working machine, so our independent chips are difficult. There are many companies that can manufacture their own photolithography machines. Photolithography machines can be said to be simple or difficult. If the accuracy requirements are not particularly high, there is actually no problem if our country manufactures them ourselves, but the requirements are high enough. There is a problem with the accuracy, because there are only a few countries that have mastered these top technologies, and those countries have formed an internal alliance. These technologies are not exported to the outside world, and they are closed internally. We do not even have the corresponding research materials and equipment. You can't buy it, and you can't buy it even if you have money, so there is no way to do it. We have to continue to improve our independent innovation capabilities and solve this problem ourselves. After all, it is never better to rely on others than to rely on ourselves. Research on this thing is of course not something that can be supported by the funds of individual companies. There are many companies in the world that can manufacture advanced optical passenger aircraft, that is, those companies with top-notch optical passenger aircraft are supported by the state and have national-level allocations for them. Corresponding funds and policies allow them to have more research and development space, to continuously improve their independent innovation capabilities, and to occupy a place in the world. This will play a very important role in improving overall national strength and national status.