Ukraine, weapons laboratory of the powers.
Beijing has been carefully studying how NATO's weapons and strategies are applied in Ukraine, Ukraine is facing the Russian machine and it shares military information with China, which is why it supports it and has used that information to identify the Achilles heels of each of the weapons that NATO and the USA use in Ukraine against Russia.
Souce
Washington already fears this, it is not an assumption that is made lightly, and this is how Washington expresses it, the USA fears that Russia is sharing with China, all this information about American weapons and to show a button;
because a United States Congressional committee “recognized that there are alarming levels of Russian adaptation that have undermined the effectiveness of domestically produced weapons systems,” in other words, that there is a high level of adaptation that has made the US weapons become obsolete for Russia.
Souce
Can the United States maintain its technological advantage in military matters in this new scenario, because the situation is much more complicated than what they are presenting to Jake Sullivan, because the weapons that until two years ago we thought were the most powerful in the world entire Washington and NATO were previously considered lethal, invulnerable.
Souce