Knowledge has its timeliness and particularity, and sometimes, a knowledge that seems very simple to you is a desperate moat for people of a certain era and period.

For example, the difference between steel and iron is the carbon content, which ancient people did not know, so for them, steel is a very precious thing, and even whether it can be practiced, whether it is good or not, there is a certain randomness.

But for modern people, no

"I Have a Conscience" Chapter 29 The Uniqueness of Knowledge is being typed, please wait a moment,

Once the content is updated, please refresh the page again to get the latest updates!