Calling a political opponent a communist is silly. Not even the Soviet Union or China called themselves communist. They called themselves socialist. Communism is when the productive surplus is controlled by the workers themselves. The government owning a business and deciding what to do with a surplus is just a government elite controlling the surplus instead of an owner or manager elite. Communism would be not a government elite or capitalist elite controlling the surplus, but the workers controlling the surplus. The socialist governments were supposed to be a transition phase to true communism. The closest things to this might be cooperatives where the workers also own the business, although those are done within a larger capitalist system.
The Muslims defeating China led to Islam being prominent in Central Asia and to paper technology leaving China and changing the world due to captured paper makers.
As the U.S. backs away from clean energy and limiting global warming on the president’s false belief that climate change is a hoax, China is stepping in as a leader globally, leading on the issue and selling its technologies and products to countries around the world. Despite its leadership and its massive renewable production, it still uses a lot of dirty coal. China’s clean energy partnerships around the world give it influence. The Trump-led U.S. is banking on past fuels and energy, while China is advancing into the future.
Trump’s deal with China has made things less bad than they were before the meeting, but they are still way worse than they were before Trump engaged in a trade war with China.
China is dominant in rare earth mining and refining. Catching up on how to refine efficiently may be the hardest part. The U.S. could do this not long ago, we let it slip and are now regretting it!