It's been a long time since I wrote a technical article about React, and React has also released its latest version, 19. Today I reread the official React website. Record the key points and new things I've learned.
This article is a personal note, reflecting my own gaps in understanding React, so it is not recommended for reading.
现实中每个人都有情绪的高峰期（极度自信）和低谷期（极度自卑难过），经济也有周期。
就比如养猪，大部分人都是看到猪肉好贵，养猪的都赚了很多钱，于是想我要是养猪也能发财。于是一不做二不休干起养猪，殊不知，你看到养猪挣钱了，别人也看到了，整个村的人都去养猪了。等到一年半以后，小猪变大猪，母猪又产仔，市场上的猪肉供给持续增加，猪肉持续降价了。但猪可不能等等再杀，大猪不在长大，留着还要赔饲料钱，只能忍痛把猪卖掉。大家都这样，猪肉进一步降价。接着发现养母猪也不再划算了，把小猪养大卖出去还不够饲料钱。这等于赔本赚吆喝了！于是全村都不养猪了，生猪变少，猪肉开始涨价，又开启了新一轮猪周期。
如果我们能捕获经济的周期，把握经济中的规律，进而提前布局，不仅能防范风险，还能获得超额回报。这就是为什么要学经济周期。
当然实际情况要复杂的多。猪周期比想象中复杂，要考虑猪粮比、猪瘟、季节性消费习惯、替代品价格等等。经济周期就更是复杂了。投资就是要寻找正确的非共识，做模糊的正确。如果是正确的共识，你顶多是赚点小钱；而只有正确的非共识，才能使你赚大钱。
本文将以严格的逻辑推理为你讲解经济周期的规律，带你寻找赚钱的机会。
A fever days ago, September 20th, 2025, I had an English exam, called PETS.
I have been learning English for nearly eight months, and I have been unemployeed for nearly eleven mouths.
According To the original plan, I should immediately review the front-end knowledge and looking for a job as soon as the results come out in a month and a half now.
But I'm confused now. I am writing this sad diary, pretending you don't understand.
