What should be paid attention to in the systematic learning formula?

I always wanted to develop in the feed industry, but I was busy with my studies before. It's time to think about applied learning! Do you guys have any good suggestions? Don't say anything about looking at stickers, it will happen naturally! - ---------------------------------------------------------------------------- Hehe, I expect a master to answer this question. -------------------------- http://www.xumuren.cn/12003/action-spacelist.html There's something worth seeing here!-------------------------------------- I also have the idea of the landlord ~~~ I want to learn systematically ~~ What basic knowledge do we need to master ~~~ Please give directions to the masters ~~ Thank you ~~~~~~~~