How to say it.
First, because these inventions can make a country a world-class country in science and technology, especially for military purposes. So of course the United States wanted to get it and did not want other countries to get it, so it blocked Nikolai and encrypted almost all his information. If the United States had not revealed the secret, perhaps very few people in the world would have known about him.
Second, Nicholas is actually very well-known abroad, and together with Leonardo da Vinci, he is recognized as the two smartest people. But China probably only popularizes Einstein, Edison and the like.
Third, I am not the one who said that alternating current was invented by him. Even our physics teachers don’t know about it, sweat. . . . And he didn't apply for a patent, otherwise he would be the richest man. This is a real scientist.
Fourth: His technology transcends the times
There are many more. You can read his biography and learn more about him.