They have invented many things so i put the three things. I know and like the most so the Chinese have a lot of beneficial things and they trade them to get better goods. And they create like barriers but only to keep certain people out. And the like to write with pictographs. Also they like to write questions on oracle bones.
It was used to to make the water flow back and it would take out the grain in it.
Iron plow tool
It was pulled as it was pulled it would make the soil come out and they would use the soil.
It was a benefit they could trade them and use the tools for their own needs.
How it benefits us still today
These things still benefit us because the water wheel to out the grain from the water. And iron tools help us mine and farm. And when we mine we can get more iron. Also they can trade with other people. The iron plow helps the farmers make the soil come up from the ground. And they can use it for farming.