Physicist Feynman famously said, I can't understand what I can't create.

Accompanying this conclusion is a set of operational ideas. First, choose a theme and a project. Second, tell it to laymen. Third, meet the gap. Third, research materials.

I learned the method and remembered the operation idea, but I was not sure about the experiment.

The book about the first-class registered fire engineer that I bought online yesterday arrived. I took it home from my mother's office with my arms around my chest. On the way, because I wanted to save some strength on my shoulder, my hand slipped, and the woven bag with books slipped from my shoulder, and Peng fell to the ground with a bang. From the outside, the packaging bag is not lost, and it is estimated that the book will not be damaged. When I got home, there was still a book with a crack in the corner.

I don't know if it's a coincidence or something. Last night, I checked the registration of the first-class fire engineer certificate on the Internet, and this investigation really found out the problem. The country has explicitly prohibited the qualification certificate from being linked, including the construction engineer and other related certificates. If you want the certificate to be valid, you must engage in the industry that has obtained the qualification certificate, otherwise it will be useless.

Thanks to the Internet and Zhihu, without you, I guess I would have spent a lot of energy and time to get an unreliable qualification certificate.

Why is it that so many things about buying books are inspired by Feynman's learning method? I am eager to find a grasping hand to practice and follow the fashion to get a fire engineer's certificate. As a result, I almost went into the pit.

Early in the morning, I packed my books and prepared to return them. Because I have to go to work, the courier won't open the door until noon. Now that I think about it, why not call the courier to pick it up?

Yesterday, I also checked the "99 Community" I invested in online. This is amazing. There is a big pit that is opening its mouth and eyeing it. Actually, thanks to my mother, I went to see her last night and watched TV for a while. Television only focuses on interviews. When it comes to blockchain, talking about the so-called digital currency and blockchain is not the same thing at all.

Things are coming, and I feel that the country will definitely deal with this chaos of digital currency trading in the name of blockchain.

I'm going to transfer the money out today, and I can't sink in any more.