Recently, the US Secretary of the Air Force pointed out that China's growing arsenal of long-range missiles and anti-satellite ** has become a threat to the United States' dominant position in areas such as air and space intelligence. To this end, the United States plans to reshape the Air Force and form a new Space Force, concentrating all resources on strategic competition with China. 
In response to this statement, Senior Colonel Zhang Xiaogang, spokesman for the Ministry of National Defense, said that the United States defines space as a "combat field", and does not hesitate to develop and deploy offensive space**, and even maliciously tracks and approaches the spacecraft of other countries, which has become the main driving force for the militarization and battlefield of space, and is also the biggest threat to space security. The United States uses threats from other countries as an excuse to expand its military power, which China firmly opposes. So why is the United States so worried about China's anti-satellite capabilities? As we all know, one of the primary goals of the United States in every war is to seize air supremacy. However, to achieve this, the Air Force alone is not enough, and satellites in space also play a vital role. For example, if you want to strike the opponent's military airfields, early warning radars and anti-aircraft missile positions, you first need satellites to locate the location of these targets; And after the strike is completed, satellite observations need to be used again in order to decide whether further strikes are needed. 
In addition, among the guidance widely used by the Air Force, satellite-guided bombs are the lowest cost and most frequently used; For the terrain matching guidance of cruise missiles, it is also necessary to use the global topographic map taken by satellites and input it into the missile's guidance head, so that the missile can fly at an ultra-low altitude close to the ground. As far as an important anti-missile system is concerned, satellites are even more crucial: If we have enough infrared reconnaissance satellites, we will be able to detect the enemy's ICBM launch in a timely manner and gain nearly half an hour of early warning time for our own side. Meteorological satellites, on the other hand, are an indispensable and critical element of military operations. 
China has reached a level in the field of satellites and anti-satellites that surpasses Russia and rivals the United States. As early as a few years ago, China announced the ability to "grasp the position of 20 large military ships around the world in real time", and among these 20 ships are American aircraft carriers and amphibious assault ships. At the same time, China's Beidou navigation system has achieved global coverage, so that every piece of large-scale equipment and even every individual soldier can be interconnected, and the level of informatization has been greatly improved. In addition, China's anti-satellite ** has conducted a number of successful tests and is close to the level of actual combat. It can be said that if China goes to war with a small or even a middle power, the result may be a one-sided victory, similar to the situation of the Gulf War. But if war breaks out with the United States, there could be silence on the ground, at sea, and in the air, or even a substantial exchange of fire at all. The competition between the two sides in space could lead to a "big meteor shower" on Earth, after which the war would end. In the competition with the United States in the space field, China's only weakness is the strength of its anti-satellite capabilities and its ability to quickly replenish and launch satellites. Although China already has a Long March-11 solid launch vehicle, which can quickly and maneuverably launch emergency satellites, it is unable to launch Starlink satellites on a large scale like SpaceX in the United States due to its backwardness in reusable rockets. 
By the end of last year, SpaceX's Falcon 9 rocket had been reused 19 times, and the launch cost per kilogram had dropped to $3,000, which is only half of China's Long March series of launch vehicles. And the Falcon Heavy rocket costs less per kilogram, only $1500. And the Starship spacecraft that is in test flight can even reduce the launch cost per kilogram to $200! The use of liquid oxygen methane engines is the best technical route for the development of reusable rockets because of the low cost, and methane, which is natural gas and easy to obtain. In addition, methane combustion produces little to no carbon deposits, so the rocket engine** can be fired again with a simple overhaul. SpaceX's Starship spacecraft uses liquid oxygen methane engines, and its latest model has a thrust of up to 269 tons each. The Tianque-12, the liquid oxygen methane engine with the largest thrust in China, has a thrust of only 80 tons in a vacuum environment, less than one-third of that of similar engines in the United States. Therefore, China's aerospace industry still needs to work hard to make up for this last shortcoming, so that it can not be afraid of the threat of the United States in the space field. 
In today's world, the space race has become a new battleground for competition between nations. China's rapid development and technological progress in the field of space have attracted widespread attention from the world. However, China still faces challenges and enormous pressure in competition with space powers such as the United States. Although China has made remarkable achievements, there are still shortcomings in key technologies such as reusable rockets. In the future, China's aerospace industry will need to continue to strengthen technology research and development and innovation to improve its strength and competitiveness in the space field. Space is not only the frontier of scientific and technological development, but also an important guarantee for development and development. China will continue to unswervingly promote space exploration and development and make greater contributions to the maintenance of world peace and security. Let us all look forward to the future of human space exploration and work together to build a more peaceful and prosperous world.