All valid points, but miss the core of the argument.
1. China isn't the only provider of these elements, their shortage would cause short term problems for western markets but long term damage to Chinese exporters
2. You really think patents and copyright are strong enough not to be circumvented by minor modifications or for a determined nation to outright forego such laws in the name of national interests? Global law is only as powerful as those enforcing it.
Good luck trying to legalese the US into submission.
3. What good are all the goods produced by China if there is no one with similar buying capacity as western markets.
1, We are almost the only supplier of rare earth and tungsten carbide, especially heavy rare earth.
2, If our navy is stronger than the USA, we can protect our routes and protect our interests overseas. It is only a matter of time before our navy surpasses the USA. I think you can live to see this day.
3, You still don't realize the impact of China's nationalization of all factories on the West. First, all Western currencies will become waste paper, currencies that cannot buy goods will not be accepted by any country. Secondly, the remaining factories in the West will soon be shut down and scrapped due to the fracture of the industrial chain. Third, China will provide essential goods and investment to countries in the non US camp, trade with CNY, re establish markets in these countries. China can also expand domestic demand. Don't forget that China has 1.4 billion people.
4, Without factories, there would be no goods. The lack of commodity support means the complete collapse of the western monetary system and the most vicious inflation.
You can use dollars to rebuild the industrial chain from scratch. But at that time, I'm afraid no country will accept the dollar. Because you can't provide any goods for these dollars.
You can imagine that Tesla's automobile factory, Apple's factory, patents and factories of various chips have suddenly become the property of Chinese state-owned enterprises overnight. Even some factories left in the West will stop production because of the rupture of the industrial chain. What will happen in the United States? You will be forced to rob necessities with a gun, just as blacks once did.
Without enough materials, American warships and tanks at that time were probably a pile of scrap iron, and even the Iraq war could not be repeated. Of course, it is more likely that the US military is busy quelling civil unrest. China will use necessities to require other resource countries to use RMB for trade settlement.
5, You come from the West and are not as familiar with industrial knowledge as the Chinese, so you really underestimate the difficulty and time of rebuilding the modern industrial system from scratch.
These are consumables for coal and oil mines. If the supply of consumables is stopped, these mines will be shut down within three days. If the work is stopped for more than three months, these machines need to be overhauled and then scrapped<So if China ZCC.CT group (factory 601, which produces 35% of the world's cemented carbide products) imposes sanctions on Russia, Russia will not be able to produce any resources.>.
The modern industrial system is a result of the gradual upgrading and accumulation of human beings over a thousand years. If the industrial chain breaks, it will be scrapped quickly, but the reconstruction time will take generations.
For example, if you want to make penicillin, a necessity of modern mankind, you first need to be able to make freeze-dried powder. If you want to make lyophilized powder, you first need high voltage current. If you want high voltage current, you first need stainless steel, special steel, rubber and electric welding. Synthetic rubber needs organic chemical industry, which needs ethylene manufacturing and aromatics manufacturing. Welding requires electrical systems, which require capacitor manufacturing and mercury arc rectifiers, which require chlorine manufacturing and aluminum industry. Just one penicillin, you need to develop hundreds of industrial links. It takes only a week for China to get resource countries to abandon the dollar, because Chinese have mastered the necessities of life and production consumables they need. The west can't even make light bulbs in a week, because it needs vacuum pumps, and then vacuum pumps need hundreds of advanced technologies.
Even if Western countries are given a hundred years, they will not be able to rebuild the whole industrial chain from scratch. China is the only country on the blue planet with a complete manufacturing industry.