What are the more important inventions in four great inventions of ancient china and Europe and America in modern times?

Gunpowder: After it spread to Europe, they attacked us with foreign guns and robbed us of our wealth.

Now their cruise missiles and aircraft carriers are better than yours.

Printing: The domestic advanced machines are either Heidelberg Roland Gaobao or Komori Mitsubishi Akiyama.

Our own machines can only make simple products. Our machine is not as durable and accurate as other machines.

Papermaking: At present, the better newsprint and coated paper in China are either from Korea or from Japan and Europe.

We can only make some poor writing paper and whiteboard in China. There are very few good ones.

Compass: Zheng He, who once took it to Europe, may now have an American GPS. How convenient!

How good is the satellite global positioning system in the sky. It is accurate enough to find a person now.

This is the difference!