Yesterday, I chatted with my colleagues, and my colleagues mentioned a job grade, which made me very depressed. Which senior can tell me more about the situation?

first, you have to tell us what kind of industry you are in. Second, not everyone needs to know this. If you really want to be self-motivated, you should work hard and learn more about some internal work processes, internal personnel relations and internal hidden rules. It's good for you to ask people less about such a level. When you have a chance to rise, you will understand that this level is what it is. It doesn't matter if you know it now. That's what I do in the company. The first thing I know is who is my direct boss, who is the boss's boss, and so on. Who else can decide my promotion? I will work and give advice to the boss.